i agree
wen i got my mods done, and had it tuned the dyno read 223rwkw i scratched my head and said, errrr 17psi GT30R, all supporting mods, and only 223rwkw WTF, then i drove it and said this aint 223rwkw... so yeh dyno's need to be calibrated correctly, the next 2 places i took it both read 261rwkw which was a much better and realistic reading... in the end it dont matter, as long as u are happy with it, just line up another car with the same power and see who wins
my 2 cents