Hispanics, and more precisely Cubans, probably put Obama over the top as they swung heavily Democratic. If they were at 2008 levels Romney probably would've won the state.
If that's true, it would be remarkable, since Cuban Americans have generally been one of the most solidly GOP voting blocs.
That trend has been weakening, especially amongst younger Cuban voters. If the statewide Democratic Party were stronger here in FL than they currently are, Democrats would be mopping the floor in statewide races.