I agree. A lot of people start there.
Not all of us stay there.
When I started going to the track, I quickly decided ET, MPH in the traps was how I wsa going to evaluate high performance.
Reality over many autocrosses and of course years of street driving, evolved into much more interest in torque off the corners.
Road course same thing except more so.
I just meant it's usually time based, like how fast you can do a lap, the only one that I can think of that's is not time based is top speed, then the answer is no a 100 mph ain't performance for an family sedan.