I live in a town of 100k residents and it's really hard to keep track of all the fast guys because half of that number is college students. Not that I really care, it's a bit of a joke that they show me the top ten on a segment since I will never be close. Even on downhills, wouldn't be prudent. I have discovered I don't bounce like I used to.
I didn't know you could see the entire ride, I'll have to look the next time I have a question. OTOH, as fast as some of these segment times are, I imagine that it's common for someone to go out and only ride fast for the segment.