Was in PA in Sept.
I'm still a novice counter so I can't speak to how much of an advantage an AP would have in PA, but the dealers, at least at Mt. Airy, were horrible. I guess you have to learn sometime but I saw:
I had 20, dealer 18. She took my bet. I was like , "Whoa!" After the boss and camera review I finally got my $25 back. Then I said "Great, where's my other $25 for winning" which sent the pit into another 10 minute tailspin before I got paid for that.
Dealer up card = Ace. She peeks, then proceeds around the table. The guy next to me has blackjack so he gets paid. Comes around to the dealer and she flips a 10 - blackjack. Another 10 minutes of turmoil ensues. Pit boss makes the guy with the blackjack payback his winning AND his original bet. All other wagers are also confiscated by the house.
Other things like double-down card is not placed perpendicular to your first two cards / $25 bet and you get a BJ. Sometimes get paid $37.50, sometimes $25, once I got $50. It varies. / PA law also forces you insure a BJ if you want even money on a dealer Ace. That adds further entertainment with a novice dealer.
I'm beginning to think the AP might not do so good in PA because you need to spend half your brain power watching the house and with all the reviews and problems, you're lucky if they can deal 30 hands per hour. Maybe things have improved since Sept. but it was a mess during my visit.