I'd imagine full tilt taking a bigger hit as I think the majority of users were from the U.S.
As for pokerstars
, I've not really noticed much a difference to be quite honest with you apart from maybe the first day of black friday. Maybe worried people etc didn't go on and there was overlays. The normal tournaments I'd usually play, fill with roughly the same amount of people and it's exactly the same times as normal.
The SnG's do fill up slightly slower, but not that much.
The games, well I think they might be also a bit easier..I'm unsure, or I'm getting better. Been posting positive results for over a month but keep getting better and better days, now this might like I say because of the lack of the presence from teh U.S grinders or because I'm getting better, I'm sure the slightly better results of late have been because some U.S players have been absent though.