I'm on PS3. Thought I'd try the online because I saw my crew was playing. Finally made a decent guy, tutorial loaded fine, got some new clothes and found a decent car. Thought I'd quit the game and just see if my file would be there when I re-booted, it was gone.
I can't imagine people playing for most of te day and then quitting only to find their data gone. I'd be very pissed. Be careful, even if it's loading stuff. When you quit, you're stuff may be gone. Had fun with it though. This is going to be awesome when all the bugs are worked out.