Maybe it’s just my computer, but it seems that when I download files in Firefox, it’s limited to around 2.2MB/sec (yes, that’s megabytes).  I know most broadband users don’t get even half those speeds, but on a college network I can cut loose.  If I use the *nix wget utility, I can often download in excess of 10MB/sec while Firefox tops out at around 2MB/sec.