This actually is something that comes up all the time on my lab board. The general consensus seems to be that most owners who have had multiple labs of many colors tend to not see any sort of consistent difference based on color except for the fact that because there tend to be more BYB chocolates, there does tend to be a kernel of truth in that theory.
My own completely unprovable theory is that you tend to see more reputable breeders leaning towards the yellows and blacks (although there are good breeders doing chocolates, don't get me wrong) therefore if you see tons and tons of chocolates in your area chances are higher than the other two colors that they are BYB.
My own completely unprovable theory is that you tend to see more reputable breeders leaning towards the yellows and blacks (although there are good breeders doing chocolates, don't get me wrong) therefore if you see tons and tons of chocolates in your area chances are higher than the other two colors that they are BYB.