I hate to blow people's theories away but I'm not a URM, had a 26 MCAT and I got 5 interviews (every school but UTSW and UTSA).
What I think people don't realize is that those 2 above are only just 2 parts of your app. There are ECs, PS, LORs, etc. that make a candidate attractive to a particular school. I applied early and 4 of 5 of my interviews were in August (1st or 2nd interview of the season for most schools).
My advice -
1) take the April MCAT no matter what (you can always upgrade your score in August)
2) Apply as early as humanly possible (this may require some forward planning and sacrificing study time, but it's worth it)
3) Diversify your profile (I played hockey - was the president for 1 yr, assistant Captain for 4 yrs) you can then talk about something other than medicine and you've developed other skills that Adcoms want (teamwork, leadership, etc)
Remember, the only numbers you really need are the ones that get you an interview. After that, your interview and personality is what clinches the deal.
Good luck and may the waitlists be good to you all!!