I never heard of it before either, that's why I did it. Since it was so early in the boil, I really doubt it will impact anything. But, since it was turkey day, why not. I know that I did hit my gravity numbers spot on! Should be drinking right around Christmas. I'll let you know.
I'm now drinking what is suppose to be a "blonde ale", though for some reason its almost the color of an amber ale. Wasn't good two to three weeks after conditioning, but turned out pretty good after 6-7 weeks of conditioning. Kind of has the characteristics of a lighter stout, that is slightly fruity.