you know what, im going to speak my mind here for a sec. so please bear with me, as it is just an opinion but i think everyones is valid.
Nice summary, but I disagree with the above statements.
-For me I have done a few moisture tests with Diatomite v Ray Nesci mix and both take similar times to dry out. The plant comparison tests bear this out too. Privet in different mixes will wilt from lack of water slower in diatomite.
So straight away that is dismissive and pretty sarcastic bud, i was just putting in my opinion.
What you may have noticed, is that i was just trying to compile a bit of info from the thread, and if you have bothered to read my experience with my current mix, i said it doesnt dry out as quick.
Youll also notice that i said i use diatomite, dont take it personally im not using 70% or more in mix, its just my choice, nothing personal against you, sorry if i offended you or your mix.
-Have to fertilise as much as anything else. Some users of Organic mixes fertilise daily anyway so really does not matter what the growing medium is. I have never changed fert Regimen when I started using in-organics, and cannot see any difference in Health or goring rates because of it.
Thats fine if that is your experience, but again, IF YOU BOTHERED TO READ MY ECPERIENCE WITH MY MIX, you would notice that with the use of my organic component being worm castings, that i have not fertilized at all in the last 8 months and getting great growth, in winter, you havent changed fertilizer regimes, thats fine, i have, and im still getting great results from using a very nutrient rich organic componeent in my mix.
the way I think is that after a few months, Any nutrients will be leached out of ANY mix because we water so often. Virtually all Nutrients for the tree must come from what we add to the mix as Fertilizer.
How much is retained in the medium depends on the cation ratio of the components. As Damian mentions here, adding zeolite to pine bark will increase its cation ratio
you start off your sentence with, "the way i think"..... THINK, so your opinion, yes? i see how that invalidates my opinion.
I am watering with worm farm leechate, very rich in nutrient itself, i have posted a topic on this, and many forum members are using worm farm products with great results, i may in the future fetilize with a liquid fettilizer as i used to do, but i havent as yet, just pointing out my experiences.
I am well aware that the amount of nutrient retained in the mix is dependant on the CEC of the media.
-Dry out Quicker? see above, but I disagree
- very little microbiological breakdown of nutrient? Huh, I reckon that has to be a benefit of in-organics, not a disadvantage
Again i was saying that in my experience, and some others in this thread have also said, diatomite drys out a little quicker, adding an organic product sometimes keeps the mix a little mroe moist for a longer period, its ok if thats not your experience.
In nature, nutrient and organic material is broken down by bacteria and fungi so it is biologically available to the plants, this is why organic fertilizers, like fish emulsion, work really well, and in a mix with a lot of organic component, that promotes biological proliferation of bacteria and benefical fungi, any nutrient in the mix that is stored in the soil componenets (the organic) or the CEC related media like zeolite (which i also use) is broken down to further beenfit the tree, instead of being flushed out the bottom of the pot.
You reckon thats a benefit of inorganics, ok thats fine thats your opinion, but what information are you going to use to back that up? or do you simply think that this is the case and therefore my opinion does not matter?
For you information ken, my backround is commercial aquaculture and water remediation. I am VERY familar with biological breakdown by bacteria, having worked on, with and developed a few pro-biotic bacterial mixes myself, and researched the extensively.
I have also worked with compost tea, and how bioliogical remediated water can benefit crops and pastures when used for irrigation, not only by introducing the beneficial bacteria back to the soil, but also by supplying organic material back to the soil that has already been broken down by bacteria.
I have also worked pretty extensively with molecular sieve medias, you may know this as a few products, zeolite, diatomite, kaolin, just to name a few.
The zeolite you use i would assume is castle mountain zeolite, as this is a very popular zeolite we use in bonsai, i use it myself, i know the company very well, considering i used to sell it for aquaculture purposes, and i am very familar with not only its makeup, its mode of action, and its application, but could probably tell YOU alot about it.
So before you COMPLETELY dismiss someones opinion just because you dont agree with it, why dont you perhaps read their post, and see what you might be able to possibly learn from someone elses experience.
"One who is confident enough to ignore another's experience without knowing anything about what they are being ignorant towards, will learn little, and not expand their horizons" - Gareth, Ausbonsai 2012
RANT OVER!!
I have lost so many trees to these buggers, I will never go back to an organic mix. 
