Mark H wrote: Of those I have studied in depth, there are two of whom I haven't been able to point to something wrong by comparing what they teach to video of elite hitters.
Got to be Steve Englishbey and Domingo Ayala.
OK, maybe not Domingo. I'll guess the second one is Paul Nyman? I'm guessing since I'm more familiar with his reputation that his actual material.
I'm happy to see another good hitting discussion come up (actually there are several interesting ones active). I found this site while I was actively trying to sort through the disparities I saw between how people were telling me I should coach a swing, and what I observed good hitters doing. At that time, SSarge and Gonein2.6 were extremely helpful in separating the wheat from the chaff in my mind. There's no doubt parents/coaches continually coming to this site with similar questions.
For those reading this that are trying to sort through these questions - Mark's analysis of the hitter on the banner contains a ton of clues. The best place to follow up on them, IMHO, would be at Steve's site.