I don't think eric is accusing you of fudging anything, he's simply stating DynoJets tend to read higher than Mustang Dynos (usually 10-15%). I don't think you'll find many people to argue against that.
From what I remember on your stock dyno plot the car looked like it pulled a ton of timing, not exactly a great baseline.
Majority of the Dyno plots we've seen here are Mustang dyno, more than likely their 310whp is more than your 310whp on the streets. Like you said numbers don't matter, so not sure why you're getting upset.