Pretty sparse on the Xbox, at least at my hours. I play 10pm to 11pm (midnight if not tired) PST (GMT -

and its rather dead. I see a few regulars, but there are very few games going, even fewer realistic, and very rarely a sim.
I do hate the hosts that get 6 in, and continue to wait and wait and wait until folks start leaving, as I bail too after awhile. I'm not waiting 10 minutes in order to play a round thats going to last 10 minutes. I get only an hour, maybe two sometimes a night to play and I'd prefer to actually be flying something during that time, not staring at a lobby

I don't even mind a lopsided run anymore, just get it started!