If you use Firefox give this add-on (DownloadThemAll) a try:
https://addons.mozilla.org/en-US/firefox/addon/201
don't know much about how, but i've found it usually downloads much faster than the normal browsers download interface, sometimes there is no difference.
We have a pretty crappy connection here (for the size of the office) but i was getting 100-120k with one of the 750MB tutorials, but only 40-50k with the browser.
cheers,
Owen Sharp
Design Technology Manager
fjmt | francis-jones morehen thorp
iMac 27" i7 2.93Ghz | 32GB RAM | OS 10.10 | Since AC5