I've had FTTC for almost 3 years now, the sync for the distance has always been bad, I was first on the cab, best I've had is just over 50, worse just under 40. Upstream has halved over the three years, but down stream has generally improved. In the early days I did try and persuade PN/BTor to look into it, but got no where apart from a basic check. It's plenty fast enough for what we use it for, so it's not worth the hassle, I'll just wait for vectoring (eci cab though) or better still gfast.
PS. Stats are on MDSLWB