I've met a handful from DTF in person. We had a good turn out for the Radio City DT show last year in NYC. I don't think anyone I've met's offline personality was any different than I thought compared to their online, either that or I didn't have enough time to find out there are different online/offline personalities
I've met.... Prog Snob, Sir Guitar Cozmo, Axeman, El Barto, Bout to Crash, Nick, Jingle, Yeshaberto, Crimsonsunrise, Millahh and Chino.