This is exactly why i take most dyno claims with a grain of salt. Unless you've done a before and after under nearly the same conditions on the SAME dyno, you really don't know what you've got.
My 03 ran 152hp in 5th gear (I think) last winter in the lower 50s. I did some mods (full exhaust, pciii map, airbox) and got back on the same dyno, this time in sweltering 95 deg heat and only got 6hp, bike practically overheating. Now the butt dyno says I likely picked up more than that, as the bike runs pulls completely different now. (Unfortunately I don't recall if my numbers were STD or SAE)
So, like I said, unless it's same bike, same conditions on same dyno, you just never no.
On another note, I hear that most guys pull runs in 4th, which gear should it be done in, and which one reads higher/lower?