I took the september mcat and did not apply until sept 29. It took a long time to get verified (lat november) but nonetheless, I still got secondaries from all schools, and 4 interview invites, 3 acceptances (i did not go to the 4th one) and I only applied to 6 schools. I guess long story short is that it is not too late, but I would only be confident if you score above the average, as the students with average and below average scores likely apply extremely early.
The one thing That I would recommend that I did not do is to get the application done before hand, send your transcripts, have all your ducks in a row, so that when your mcat score is realeased, they can immediately begin to process it. I did not do that, and I should have.
Good luck