OK, this thread is blossoming a bit. My own take on Porsche sound is like this. I've driven 930 Turbo cars. I've worked on more than a few mid 70's cars [My background and training is all Euro]. And having driven Ferrari, Porsche, big and small block Ford, Chrysler and Chevy, and I for one am not enamored with Porsche sound. You can train the American to work on Euro but you cannot take the American out of that wrench. I actually like the pulse of a Subaru flat four as much as anything that came out of Stuttgart. The only Porsche that ever got me revved was a whale tail mid 80's Turbo that I tuned back in 91. THAT car was a beast and it came on so brutally and the tone was all business to my ears. But it stopped as good as it went so I was OK with what that car offered. But my ears love small and big block Chevrolet, and now LS architecture.
That is the sound I love and may one day lament. Although I suspect that sound will still be throbbing long after I've left this plane.