Pony, don't worry, i didn't get offended or anything. You've certainly made some good points, Jazz clubs are filled with people who are posers, and sometimes I wonder who they are posing to - because there aren't that many people who hang around jazz clubs!
That thing about jazz players being more devoted to technique than rock players is right, for most people. A lot of the really cool rock musicians are people who used to be jazz players and so bring a lot of cool ideas to their rock playing. An example is Mitch Mitchell, who I think was an awesome drummer with an absolutely crazy sense of rhythm.