Speaking of the "teachers don't show" point in Asia, there's also the "teachers tell their upper-level students not to tell lower-level students". Which means that if one makes some "friends" in the dojo, and especially as a Westerner is fooled by the smiley faces and joyful atmosphere of the dojo (!), and then asks a question about "how" to do something, the answer is most often "I don't know how I do it", or "just concentrate on (some vague and practically useless thing)".
One of the better ones I've heard about is when someone asks a direct question, they're told, "Eat more rice". What an insult. And I know a number of people on the forum know who I'm talking about.