It won't stay that way. Where Twilight Princess, Super Mario Galaxy, Assassin's Creed, Call of Duty 4, Bioshock, Halo 3 and The Orange Box failed, GTA IV will fail as well.
Let me put it into context for you: all it takes is three scores of 90% or lower to put in under OoT. There are probably about 60 more reviews to come. EDGE is probably not going to give it a 10, and so won't some other sources just for the attention they'll get by giving it a relatively low score. It's not gonna happen Sony and MS fanboys, go back to bed, dream on.