Good info.
I've found that slow front toss my son's exit velo was mid to high 80s. But off a tee it is high 70s to 80. He's a line drive hitter. His very old friend who looks to be going to D2, I swear, visually has a big, slow-looking, looping swing. But he can hit low 90s off a tee. He can hit some deep shots, but those seem to be rarer than line drives. But he's 6'2" and my son is 5'10" so D3 was the best my son could aspire to (and he's going to go to Virginia Tech and try to play club so all is very good). I guess the eye test can be wrong and that's why we have machines...