My experiences with them are opposite of Shawn's. I shoot the takedowns much better, much better than any bow I've shot for that matter. I can get both equally quiet. In fact my PL longbow was louder than all of the other models I shot.
As far as speed, I really couldn't tell ya. I've never chronoed any bow so I don't know exact speeds. I will say that I asked Roger (from BW) this question and while they wouldn't release specific numbers from their in-house testing, he says there is no difference in the PMA, PSA, PTF, or PA. He said all of those models have their limbs layed up on the same form and there is no difference in preformance. I have heard the bamboo limbs add about 2 fps.
This is coming from BW. If someone did some independant testing and came up with differnt results, I can't comment on that.
All this said, if I had to choose 1 bow from their lineup to be my ultimate hunting bow, I'd choose the PTF. It is so darn sexy! Just more accurate with the takedowns :(