Yeha... I believe that the dyno they had was a Mustang Dyno, 2WD. I have heard they read a bit high anyways... but like you said, every dyno is different.
When I had my Turbo Eclipse, I dynoed it 6 times (6 pulls), 2 different AWD dynos, in 3 days and got anywhere from 310 to 318 WHP. So yeah. :)