I mostly agree with OP other than the "casual questing" comment. I would consider myself "casual" at this point in my life (have time to play maybe 10-15 hours a week) and I just dinged 50 a couple days ago (on 1 job)...and I was open beta/early access.

You cannot tell me that any single definition of the word casual represents anyone who can get from 0-50 in 1 week of playing, period. Sorry.