It's not too hard to believe that games get better scores from IGN after a donation is made, or some other deal is struck. AAA releases that get high scores sometimes fall flat on sales or get some kind of customer backlash later for being trash. Meanwhile games from smaller companies get smaller scores (or no score at all) yet sell near half a million copies and get lots of word-of-mouth recommendations from people who were originally dubious.
Then there's the fact that some reviewers have said they spend more time playing games of a specific genre or company because they prefer those ones. Suddenly they're reviewing something completely different. Common sense says: Of course they'll find it harder to understand and feel either frustrated or unimpressed! On the one hand, it can prevent fanboy gushing over how great something is that really isn't, but on the other hand there's likely to be much more bashing on the bad points.
Then there's the fact that some reviewers have said they spend more time playing games of a specific genre or company because they prefer those ones. Suddenly they're reviewing something completely different. Common sense says: Of course they'll find it harder to understand and feel either frustrated or unimpressed! On the one hand, it can prevent fanboy gushing over how great something is that really isn't, but on the other hand there's likely to be much more bashing on the bad points.