stevty2889 makes a good point. With AMD64 processors, dual channel won't make too much of a different. It's memory control is on-die(or something like that). Sure, it's faster, but to see real differences you would need to use an Intel processor. I suppose it could be looked at as an advantage/disadvantage to A64 chips. I just think to myself I never have to worry about 2 sticks of ram to get better performance when one can do just fine.
What's your build? It's true, there are other factors to this.