Wooo! That guy can play.
My ITs can get me close to that sort of tone, a bit thicker sounding and not so glassy though.
However, my strings are 11s and I'm quite aggressive on both right and left hand. It looks to me like he's got a scalloped fingerboard, and his strings look a fair bit floppier than mine, so his touch is probably a lot lighter. I suspect he'd exactly sound the same if he put ITs in there... (whether he'd prefer MMs or Sultans instead though, I couldn't say!)
Well impressed with his playing - ended up watching several clips. Interesting hearing him talking about what he does as well.