OT: Are UK players at a disadvantage?

[shandyboy]

Im a part time player multi-tabling SNGs outside of work hours. To date, i have predominantly played on 'European' sites, therefore typically i face 'casual' evening players. i play at the £10 or £20 level.

Having moved to PS recently ($16 turbos) I have noticed a marked decrease in my ROI. Obviously im aware the nature of turbos will decrease my ROI, but also, im aware im typically facing daytime american players (with the UK being 5 hours ahead)

Is this a disadvantage, assuming a daytime US player is likely playing more 'professionally' rather than the avg casual donk? Ive certainly noticed a marked increase in the number of multi-tablers?

Any opinions?