adjustments aren't really that big of an issue. we see adjustments here every now and then. a few dozen thousands less here, a few dozen thousands added here and so on. happens regularly.
only issue now is the size of the adjustment. a few dozen thousands isn't so bad. but an adjustment of over a million for ps3, almost a million for x360 etc just made this site look really bad. many people would now think that the model being used by vgc is very amaturish (is that a word?) or very inaccurate/unreliable. either that or they'll say that vgc numbers are just being pulled out of the air somewhere and have thier fingers crossed hoping to get it right or at least near the predictions of others like NPD.
i bet many a vgc haters will definitely jump on this like a pack of hungry wolves.
no offense, but imo, to many, this site's reputation and credibility just went from hero to zero.
i on the other hand, still think that what ioi and friends are doing here is remarkable given that its not sponsored by any really huge company.