Of course, I suppose this will only work if you are getting less than what's promised. Cool that it worked for you!
I have Comcast cable and I am supposed to be getting at least 500K upload, but I'm not getting it. I don't pay for it though. Whatever it is, we're getting half of what was promised though.

Download is a whopping 1.5 though.
-=edit=- Shite! Comcast is going to get their bawls broke. I just did a line speed test at Broadband Reports and they peeled back our top speed to ~768 K! We're paying for 1.5!! I recommend everybody should check periodically after finding this out! We just got this connection two months ago!