Red is the fastest. Haha jk if I had a preference I'd go with either red or black. But if you think about it, all the colors look great. You'll be lucky if you get to pick a color from what I hear; you have to wait a long time and most people choose whatever comes in first. Just my $0.02
I haven't seen the 09's in red either, but I know that they all are different shades. I was in where I bought mine about a month ago and they told me about how the new colors changed. He said that the red looks more like a redish-orange, and the blue had a purple tint to it.
I bought red beceuse it was either that one or the blue... Red just caught my eye a little better. If I had my druthers, black would have been at the top of the list fo sho, second being Kawi Green (or the new special edition, that's pretty sweet), third the red, and finally blue.
Actually I preferred red and black but mine is blue. as for red, I worried that red color may get faded/dull after few years (is that what you mean by dull?) and I did'n't go for black worrying about safety during night riding. BTW, the ninja 250R looks great in any color! include white and orange!
I went blue, its a lot different than the 08 blue, more of a deep metallic blue. That and not a lot of people have the blue as its not available in some other countries, my second choice would be the special edition.