I was expecting this to be a discussion of the game, and not news that it just got leaked. Anyway, a look at torrent sites indicate that there appears to be two different versions. One's 22GB and the other one is 41GB. I think the 41GB one is the legit one.
Seriously though, pirating PS3 retail titles is not really that ... efficient. I'm not sure if there are download limits in the US, but in Canada, there are download limits. Where I'm currently living, I get 60GB monthly, though the internet I have at my permanent residence I get 125GB limit. If I go over, it costs me (apparently). PS3 games are too big to pirate unless you have really good download speeds.
Anyway, it kind of sucks this happens because it's hurting the industry, but I don't see a PS3 leak being as damaging as a PC game leak.