I tried it just now, I usually max out at 50-70KB/s download speed (slow connection) and am still getting the same. Doesn't seem to be any slower than usual.
Then again it might depend on your provider. Who's the ISP?
I'm using Firefox for the browser with the DownthemAll addon, and set the number of simultaneous downloads & the number of segments per download = 1. Even though this seems off, this will still give you better speeds than through the browser alone.
(If you use multiple segments or simultaneous D/Ls it may not work).