I'd like to see Jim's dyno run with the intake air temp monitored, and altered, as well as fuel quality. To the variables we see as consumers when we use these things. So we can see the numbers in the less than perfect world, and most likely to be experienced by the owners of these. Does he run down the street and get fuel from the gas station for his tests like we are running in the sleds in real life?
All these dyno tests are in a controlled setting, and never show a variance from the real life differences we all see everyday with fuel quality and ambient / intake air temps among other influencing variables.
So yes, if all the conditions in the dyno cell on test day are the same in real life it should perform to those specs.
But that's not reality.