Rainbird on 10 May 2011
It depends on the kind of exclusivity. Sony are known for trusting developers and giving them great creative freedom with budgets to match, so aside from a game that may be greatly optimized for the PS3, any game Sony publishes will build on creative freedom and not be marked by restraints from management and budget.
Many multiplat publishers seem to be going down this route anyway, so it's not that unique to exclusives any more.
