Same thing happened to me, i used to have like a 30 mbps dl speed and 16 mbps upload, but now its like 16.5 mbps DL and 5 mbps UL. Dumb Comcast.
P.S. anyone here have Verizon FiOs? I wanna know if its reliable or not, cuz i might be getting it soon when it comes to our area!
EDIT (to Mozer):
In Washington DC (closer to me)
Holy Shit I didn't know it got WORSE