It says you hit. (Specifically, it says you score a critical hit.)
That means: you hit.
I think this is the crux of Nifft's argument, and is what I will make my counterpoint against.
I think everyone agrees that the PP ability gives you a critical hit. But....Draco's point is that the rules specifically say that a Critical Hit DOESN'T mean its an Actual Hit.
Critical "hit" is a misnomer. The Precision rule states that critical hits on die rolls other than a 20 may not be a hit. You still have to confirm the attack roll.
So if I roll 2 2's on my die, its a critical hit. But the precision rule states that I have to check the die rule to see if its an actual hit. More than likely its not, so I still miss.
That said, I believe there is a rule that states that if a critical hit "misses", you still treat it like a regular (non critical) hit. However, perhaps that rule is only rolling on a 20, and I could be completely mistaken on this point.
Lastly, let me say that its good to see an actual rules debate in the rules forum. This forum had gotten quite boring lately!