Dani - I can trot out every champion in every class since 1949 in my sleep so I'm fully aware that 2004 was Rossi's first title for Yamaha but I think you'll find that HRC claimed the constructors world championship due to the lack of comparable results to Rossi from Yam and the amount of RCVs on the grid - exactly my thinking in 2000. Can't be arsed to BJ.C it but if you are suggesting that Suzuki also won the CWC in KRjnr's championship year then given his dominance that would make sense. I dunno, your post is ambiguous. Suzuki did win with Junior in 2000, we know that - or are you saying that they also won the manufacturers championship? I thought not, again given the ubiquity of Honda. Then again Kenny won lot of races that year so I wouldn't be surprised to hear it.
The point #22 is making is that constructors world championship is fairly toothless on the marketing front.
Or one cult of personality in particular.