I couldn't disagree much more with you. I'm a big Porsche fan, always have been, always will be, but to suggest that a vanilla carrera s is "the most devastating track day machine straight from the show room for decent money" is bordering on insanity. Ok, so the brakes, engine, suspension etc are all strong and of a high standard, but the s isn't meant as a track day car. You can buy several cars straight from the showroom that will destroy a carrera s on most tracks. A few examples would be Radical SR3 (or the SR8 (even better)), pretty much any of the caterfields, elises/exiges, a large proportion of the TVR family, etc...
The carrera s is just too heavy to be a "devastating track day machine"