Depends on the dyno. Kito's Mustang dyno in Seattle reads low, and so could yours. My stock #'s were 177hp/200tq and my VF39'd numbers were 225hp/250tq, whereas a stock STi on their dyno pulls about 230/230.
So with the VF39 I pulled about +50hp/+50tq, which is a decent gain, knowing my stock #'s on the same dyno. Did you do a baseline pull? If not, ask your tuner if he has stock #'s for an 06 rex or for an Sti. It's all relative.