Count Lopez’s steps at halfcourt in the block on Kobe and the video where Wall out runs him. He is at least one step slow. You add that step and he is still in front of Wall thus the 43 rating is too slow. If I was a scientist I would provide this as evidence that combine sprints which are done in a gym wearing gym shoes are fairly accurate reflections on how fast a player will run in a game.
Exhibit B
http://www.youtube.com/watch?v=yuHJ3tAuPbA
Nene had guard speed at the combine. He has guard speed in the NBA even while dribbling.
When bigs put on weight if they want to stay in the league its going to be muscle and it wont slow them down. If Rudy Gobert puts on 15 pounds he isn’t going to slow down. Now if Demarcus Cousins puts on 15 pounds that’s different but he is no more likely to gain it and get slower than lose it and get faster.
Aaron Gray had one of the slowest sprint at the combine and Bynum has bad knees. I have no problem with them being slow just not Big Looser slow.