While that is true as far as the canon goes, it is worth mentioning that she was intended to be revealed as half-Romulan in the 5th season of ENT... this would have explained her lack of discipline when it came to Trillium D in the 3rd season. But since we never got a 5th season of ENT, yeah, T'Pol is full Vulcan.
To be perfectly honest, I wouldn't mind that. The "new old Klingons" were fascinating to me in ENT. I would have liked to have seen more of them, particularly that first generation of them who had to deal with the "synaptic re-ordering" that made them act more like humans than Klingons.