Oh I love rustling jimmies left right and centre, but I legitimately believe there's a significant difference between Trent's power figures and roller dynos. Have seen too many of his customer cars produce different results elsewhere at several different places, and no one in the country seems to be able to replicate mr HG's turbo results, except those who get their cars tuned at Trent's. It doesn't say anything about the tuner, unless they are in denial of the power reading difference.
The only reason I get rustled over the differential is because people masturbate to a 350kw run, talking about how responsive it is for so much power, when the thing would make 300 everywhere else. That and these people whinge when they go to other dyno days and are down 50kw, saying it's a shit dyno that must read low cause they lost all their power. Case in point: our SAU dyno day at RE customs 4 years ago.