They are very relevant, sales generally do not go back up once they've gone down, if after ten weeks a game's sales have already tailed into the low thousands then four months after that it's probably close to zero.MinionJoe said:BF4's sales during its first ten weeks are irrelevant when discussion BF4's current sales.
BF3's biggest strength was that it just kept selling, until 15 million people had it (mostly on PC too), BF4 most definitely hasn't done that (and neither has Titanfall for that matter). Sadly there aren't any right now sales figures to talk about, so the opening months are all there is to go on.