flagship on 11 November 2010
I think part of it is reviewers trying to attract new users to their sites. Nearly everyone is going to review COD, but a much smaller group will review a specific piece of shovelware, post a review of it and your going to get traffic from people googling it looking for a review.
Also another problem game reviewers have is big developers get really angry when they give low scores to Big hits at release (Fallout New Vegas anyone?) and then threaten to pull add revenue. So you want to make sure that your review is accurate because the developer will call you on it and if the review is low well you might just want to wait a couple weeks before publishing it...
