Well to those who balk at best platformer ever, it isn't saying it is better then say...Mario World AT THE TIME, but of course, times have changed. Yes Mario World was great for when it came out, but it is not now the best platformer ever unless it is given huge nostalgia points. At one point Final Fantasy 1 was the best console RPG ever, but that doesn't mean its even in the top 10 now.
It is important to separate current games and how good they are from old games and how good they WERE.
I am not positive LBP is the best platformer ever since I have only played a demo, but I don't see it as beyond the realm of the possibility. The breadth of levels, even in the basic game, is simply amazing. Add to that that almost no serious platformers have come out in the last decade (Symphony of the Night was the last one I remember being taken really seriously) and I think it has a good shot at that title. That is doubly true if you include the development kit which is amazing even for simple character creation. I think the first few minutes I spent customizing my sack boy rank up there with the best video gaming I've had in over 20 years.
For those who say its impossible, what game is your best platformer ever? My runner up would by symphony of the Night personally, which is still pretty awesome (I just got it on the PSP) though I'd assume Mario World or Sonic 2 would be on the list for others.
Dark horse best platformer ever? Mega Man X2.
PSN ID: ChosenOne feel free to add me