The aformentioned "big blue SEGA"
As for Platinum, they're comprised of mostly ex-Clover Studios employees. In the minds of many hardcore gamers, that's some pedigree, but the truth is, their games got mixed reviews. (No matter how much I love GodHand, not everyone did.) Hopefully, MadWorld will start a trend of critical acclaim, so that gamers who do look beyond the big blue SEGA will know a game with the Platinum logo is one to check out.
Look for a MadWorld review coming soon!