Yeah, they say nothing! See this articles: http://waw.wardsauto.com/ar/auto_enginerating_ripup/
http://www.sae.org/certifiedpower/details.htm

I mean, it's known that the manufacturers specifications are always 'better' than in real.

If you take your Crossfire (or whatever you drive now) to a test center, they would tell you something around 210 HP, I'd guess. Manufacturers mostly do measurements on a engine in perfect condition and in a superb environment.

So it's not a new counting of HP but counting HP under real/normal conditions.