I'd say 9.2 only because IGN will have to find something wrong with it.. It'll be great.. regardless..
Here's a thought: How many of you would still play it if IGN gave it a 4.0 rating??
Depends on other reviews. If that 4 was an outlier and everyone else loved it, it would mean nothing. If that 4 were typical, I'd proabably stay far away.