NO, that's not correct. Ford, Chevy , and Cummins all get slammed in the real world on the rollers out of the factory.
Put it this way, when you put a few mods on your truck and hit the 500HP mark or the 1000 Ft Lb mark it is really a much better gain than most magazine readers see it as. Everyone is thinking it's only 150 HP more than factory, that's nnot much.... But real world it's double.