Desyncs are way down, I'd say less than 10% now end in a minidump, which is most likely resource related in the late game. Desyncs are rare, probably less than 1%, however, there is one that exists still, and they are actively trying to fix it, but because of it's rarity the community has had a hard time of giving the devs examples to look at.
I'd come back if I were you, the game is pretty stable and ICO had it's lag problems fixed.
