I think I'd probably like to see it measured like the 40-yard dash. Incremental points at say 15, 30, 40, 50 yards.
The comparison I saw was Cody Kessler vs Cam Newton. At 30 yards, they measured quite similar and that almost looks like a false reading. Push that to 40 or 50 yards, you'd start to see a real staggering between those with and those without.