If you review the National Underclassmen times (end of 8th grade school year) you will find 8th grade athletes (WR, RB, DB, QB) doing the following:
Elite: 4.6-4.7 (10% of the top 10%)
Excellent: 4.8 (rare)
Above average: 4.9-5.2
Average: 5.3-5.4
Below Average: 5.5 or worse
Elite: 4.6-4.7 (10% of the top 10%)
Excellent: 4.8 (rare)
Above average: 4.9-5.2
Average: 5.3-5.4
Below Average: 5.5 or worse