I've driven two cars at or around 100mph on the highway -- a Datsun 240Z and a Plymouth Caravelle. The former I borrowed from a friend for a trip-with-a-girl, the latter I drove as a salesman.
Guess which car was better at 100mph. Nope, the Caravelle...by a mile.
I nudged the Z to 100 (it might have been 90 something...happened 30 years ago and yes my beard is gray) and immediately reduced the speed to 70mph range for the rest of the trip due to the feeling of a car about to be out of control.
The Caravelle, on the other hand, never felt out of its element. I pushed it very hard, on winding roads...no issues. I cruised at 85mph for hours...no issues. I would start it, immediately slam it into gear, and go. Couldn't have asked for more from a car...and I don't like Plym/Chry/Dodg vehicles (for personal ownership).
So, you never know what cars suck at being cars until you drive them. Sounds like this Porsche sucks. And it also sounds like Paul's "friend" wasn't.