Regarding online poker schools, I just have an opinion that is different to yours. I think most of them are harmful, because they are teaching the old style that no longer works. Poker is a living thing, and it is evolving, it is not static. For example, look at how Daniel Negreanu was playing 10 years ago, and what he was teaching at the time, and how he plays today. Indeed he's a genius, because he has found the strength to abandon his old style and adapt to the new reality. ... Well, that's just my opinion, of course, but if it means something to you, I am a 2 times winner of the Bitcointalk Poker Series. (I know bragging is wrong, but I hope it's relevant, just this once. 
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Just interesting for me. I`m playing soccer for more then 15 years and i see how it changes. I see how change boots, ball, training ground. It is the one side. On the other side - team work between players in different situations. And the rules changes too. )But when you playing poker - you playing with the same rules and same cards. Can it be so, that the old strategy will be better then new? Even because the new player don`t know about it?