I have a three-tap T tower, and I don't think there is any more beer in the line than when I had a single tap straight chrome tower. I made the T tower out of PVC, and I insulated the hell out of it. When I pour, I just pour a couple of ounces, stop and let the foam die down, and then I pour the rest of the pint. I get a perfect pour every time.
Hope that helps.