Plx: I have a static IP (58.28.x.x), on Fusion, my speedtest results from LA have always been around 3500 -4500kbs, but youtube tonight didn't stream without hiccuping all the through - had to wait for it to download. I'll test again this weekend.
Did another test on Sunday, restarted PC (bit slow after Hibernation) and was able to stream Youtube fine. Tried the same thing on Monday night, same video and it would be pausing every 6-7 seconds. Speedtest said 3500 kbs from LA. So, as another poster said, a static IP won't help.