Movin' on up... Is this what it's gonna be like? (10,000 hands)

[Bokonnon]

How much of a win-rate hit can a person expect moving from Party .50/1 to 1/2? Obviously the players will be a bit better, on average, but how much better?

The reason I ask:

5,000+ hands Party .50/1 -- VPIP 17.6, PFR 8.3, BB/100 7.5
5,000+ hands Party 1/2 -- VPIP 17.8, pfr 8.8, BB/100 1.6

All other important stats (with that one obvious exception...) are likewise similar at the two levels. In other words, I'm playing pretty much the same. Could that be part of the problem?

Ignore these stats, if you like. (I recognize that my sample size is small enough that the hit to my win rate probably doesn't actually mean as much as it FEELS like it means.) I'm really just curious to hear other players' experiences with the move, and if anyone had to make significant adjustments to his/her game.

Thanks in advance. You guys rock.