heh heh. Everybody knows that the passenger seat travels 25% faster than the drivers seat. However you do get spoiled in the 911. I think most people don't realize the capabilities of most modern sports cars and have no idea where the limit is. I think everyone should go to at least one autocross school where they are free to find and exceed the limit safely.
Reminds me... We give "touring laps" in the racecar on certain weekends. Now we're limited to about 75mph but this suffices in the corners for your average uninitiated rider. The best part is when we are tooling along and the passenger is hanging on for dear life -- then you look over at them and mention that this is how fast you go on the warmup lap while swerving around to heat up the tires.