It's an interesting disparity - I do think time away from initial release and an enforced 1-5 system may move us away from the extreme high end. I see 90s becoming a lot rarer than on OC/MC
At the same time, the majority of those who review the game here are going to be those who wanted the game beforehand, fans of a particular genre/series or were convinced by other reviews around the time of release. They're also very likely to be people who put down money on the game - in that regard, we could see fewer lower end scores too (the old 'sunk cost' argument).
Of course that's all hypothetical, just some random musings. Nothing to take too seriously just mildly interesting to geeks like me