I found a lot of variability depending on where I tested. NY for example was about 5X Chicago which is odd since Chicago is a lot closer to me physically.
You should post what your advertised speed is too for comparison sake, I'm fairly close to mine 3mb/s down 768kb/s up. My up-down ratio seems to be the most even here. Of course in most instances, that's because my down is slow...
I've always been annoyed when I ftp with others, because they ALWAYS download off of me faster, looking at the other home connections here, I can see why.