No it's actually not as long as you don't prove his dildo is exactly the same size as his own penis.If Barrett Long's dildo insertable length is 8.5 then that is how long his dick is until proven differently.
Many or most people watching porn can easily believe he is 8.5" but for real as I have seen genuine 8.5" it should look bigger. He still is very big but 8" not more or even 7.5-8" range as he seems not fully erect most of the time