I think as a game it is a success. But as playstation mascot game then no, not yet at least.
When you think of what made a console- you would think Mario for Nintendo (not just the main mario games but all the other mario based games, mario kart, SSB, etc.) and Halo for Xbox. Halo made xbox, when people think of xbox they think of Halo- its' their flagship series.
I doubt when people think of PS3- they think of LBP, also to have that happen the playstation install base needs to back it up. Many Xbox users have Halo, many Nintendo users played Mario at some point (over 7 mil units sold in this gen alone for each).
There is still a chance LBP could be their game, don't need to compare it to the explosive sales of Mario or Halo when they first came out, in a few years sales might climb pretty high.









