To be honest, I don't think that's necessarily the case. I had an AADSAS GPA of a 4.04 (I guess honors classes count as 5.0's or A+'s count as 4.3's), and 22/22/20 on my DAT's, but I didn't get any interviews until after February. To be fair, I applied in early August, but that's not THAT late. And I haven't heard from 4/9 of the dental schools I applied to about anything. I'm waitlisted at 3 schools, and was only accepted to 1.
I think that D-schools aren't necessarily looking for numbers. Or at the very least, the numbers are more a pre-requisite than a guarantee at an interview. I would be lying if I said I knew what the ad boards were looking for, but it's obvious you need something other than your GPA and DAT scores to get you in.
If I had to do it over again:
APPLY JUNE 1 NO MATTER WHAT
Get a 3.5+ GPA, and 20+ DAT
research with a more active lab (I'd imagine they like published papers)
volunteer at dental clinics
have a good story/distinguishing characteristic