Yes I have too. Even though I only have a "lowly" 87 924S, I've noticed that above about 80mph the car's whole feel changes. Whereas most cars I've owned start to get noticably less stable and lighter feeling in the front end as 100mph approaches... the 924S seems to feel even more glued to the road... I'd swear that it even feels like it's crouching down slightly
-MAS