So let's see. My D2 team's overall Ath is 50.
Are all my guys clustered in the 45-55 range? Are my 6 bigs averaging 65 and my 6 littles 35 with lots of speed?
My D2 team's overall Def is 50.
Again, is it a cluster? Am I starting 5 upperclassmen with an average rating of 75, while the bench is a bunch of freshmen and sophomores averaging in the low 30's?
My D2 team's overall speed is 50.
40-60, team-wide? Or do I have one guy with a 95 rating, two 85's and three 70's, along with a few plodding centers with a rating between 1 and 15 and some mediocre speed ratings to round out the roster?
Unless you're dealing with extremes, category averages tell you nothing about how a team is put together. Sure, if you're in D2 and you see a 75/75 Ath/Def team you're going to sit up and take notice... but then you've probably already observed that you're a 40-point dog at home against them.