Look at? Sometimes. Use to verify? Seriously?
1- nobody behind the top two ran a new top. Several went FORWARD the next time, or paired up.
2- the track got a little slower as the day went on, but stayed in a pretty tight range. I actually had the track slower for the two races after that one. Anybody who had that race a lot slower broke it out (a lot) and gave out terrible figures to all behind the top two.