While I agree, AAA originally comes from the high budget and high quality of the developers. But I prefer the addition of the metacritic or gameranking scores because, just because the budget is high and the quality is supposed to be there doesn't mean a good game will be the result. For example Killzone 1 on PS2 had a large budget and was supposed to be one of the best games on the PS2. As we all know it fell short.
It's all opinion anyway. GTA4 is AAA by both definitions and I wouldn't give this game one A, but that's just my opinion.












