You have to see the colors in real life. When I saw all bikes together at a bike fair, the grey one stood out. I liked the blue and orange most when I only had seen pics....
When i had to decide about color, i choose between race-blue and matt-grey. The reason was that i don't like gold color of the front fork and the stripes on wheels of deep-armour and blazzing-orange.
So, i think that race-blue is for younger people when matt-grey is for the older.... also is something "dark", with no other colors on it, than black-silver-grey.
Also here in Greece matt-grey is 140 euros cheaper than all the other colors.
That yellow is a beauty! If it was between race blue and grey I would choose grey. Having said that, I ended up buying the orange bike and I hated it the first time I saw it! It grew on me very very quickly though.
i do a lot of riding in an area thats called 'the darkside' and theres some damn fine riding to be enjoyed there n all..............but i aint doin no grey bike. nope.