Were comparing a kid's soph and junior times to a guy in College.
The Rocket's miracle 4.16 40 wasnt during his time in HS in Pennsylvania. It was after a few years of training at one of the premiere universities in the country vs a HS kid at a camp. So lets slow down on that.
Next, the difference between 10.2 and 10.6 is notable but not huge. Florida's Chris Rainey was a 10.6/10.7 runner in HS and his running mate Jeff Demps set the record in HS at 10.01. Yet, when you saw them run there wasn't much difference on the field. In fact, many reports had Rainey beating Demps in footraces at practice. So the difference isn't huge.
And as for the 40 at the Atlanta Nike Camp, many kids suffer when they run E-Timed 40s because they're unaware of how to do it. Which makes sense considering the next time CJ Sanders ran the 40 which was the first round of the Opening, he ran a 4.32.