I tend to believe numbers, at this level, mean next to nothing. Programs ask for them because they have to...at least to maintain a sense of credibility in our grading system. I double majored as an undergrad and, thus, my GPA was a terrible 3.16. My ENG degree GPA was like a 3.75 and my Poli Sci was around 3.0. But do they break that down on your transcripts? Do they give these explanation about how people grade, and scale numbers, etc? Nope...Numbers are numbers, mostly meant in a universal capacity.
And even, look at the credibility of GRE scores anymore. Something interesting to note is when people post their numbers on the results forum how, despite huge differences, there is no pattern. Not everyone with a 4.0 and 700+ GRE subject scores gets in...nor does a 5.5 or 6.0 on the writing portion much matter. I see people with 4 out of 6 on their writing portion and 3.5 GPA's getting in everywhere!
My 4.0 from my MFA is worthless...I'm also not discouraged with the 530 subject score because, oddly enough, I've been teaching literature for 4 years now at the collegiate level.
You're an investment...a walking dollar sign. Whether you get in or not is based, highly, on your potential. If you're a 4.0, 700+, 6 of 6 writing sample person, good for you! But these programs want personality. They want someone who is going to make their program thrive, not just exist.
Grades are meaningless...just don't get too many B's.