Colour Recognition in Branding

I decided to experiment with how important colour is in brand recognition. I decided to exlude the colours of a logo and reproduce them as a series of circles- to keep the shape of the logo as ambiguous as possible. See results below

With the McDonald's and Burger King the results were pretty unanimous, however with Dove and Coors the results were mixed. Is this something to do with the popularity of the brand? Or are the colours of McDs and BK so ingrained in peoples subconsious?

Maybe this links back to the theory that colour relation is dependant on culture age etc rather than a generalised theory?