Download bars in business often report extremely slow downloads.  I know, I'm responsible for technology that causes that.  Sorry, but it's for security.  It's called data trickling, and it's something that proxies do while they're scanning for malicious downloads.  While the proxy is scanning, only little bits of data are trickled out to the browser.  That way, you won't be getting the download until it's deemed safe.  Don't panic, even though it says your big download is going to take a week it's really going to get to you sooner.  The proxy is sucking down that file at full ISP speeds.  When it finishes the scanning and assuming the file is marked safe, the proxy is going to spew it out to your browser at full LAN speeds.  If you're patient enough to stare at the progress bar until it finishes, you can actually see this.  It'll trickle along at painfully slow speeds and then all the sudden come zooming down as if the damn had broken.  Some proxies provide a download page with it's own progress bar.  We do that too; and for humans, that works great.  Unfortunately, there is technology that doesn't like that, and we have to make a judgement call on what gets trickling and what gets the Proxy's download page.  It would be nice if someone would right an RFC that would allow for a proxy to do tricking and also tell the browser what to show in the progress bar to better report what is actually happening, but that would be a tricky and probably messy technology to pull off.  Anyway, we still have to respond to support calls complaining of week-long downloads, and all we can do is respond in the exact manner that I've just written.