I don't owna Porsche, never did, never drove one
However, we just sold our Audi TT (trade in for the M5) and I can only assure on thing: The brakes are AMAZING! this is my 0.02 about how BMW could improve their cars. I've owned many BMW's and NOONE ever satisfied me fully on its brake system/efficiency. Since everybody talks about upgrading brakes, using Porsche's brakes or similar, and being the Audi a Porsche partner, I can only imagine how much better the brakes on a Porsche are...yumi yumi yumi!
Marcelo