Latest pressure is down to 961mb, so it's definitely into Cat 2 territory, the cat 3 territory is very possible now if it slows down further.
I don't expect it, but this is reminding me of what occured in Charley before landfall (intensity, not track wise), except the storm is moving west and much slower.
edit:
Vortex message clarifies it, 964mb. Still an impressive drop in a short amount of time.