I believe you're talking about Aspera, recently bought by IBM. It's pretty fast and reliable and I've never had a problem with it over even residential Internet speeds ( many master files for delivery well over 100GB). Bitmax is the big CDN that uses it for media delivery.
There's a free alternative I have to talk up any time Aspera gets mentioned, and that's GridFTP by way of Globus Connect.[1] It's pitched as a way to move massive quantities of research data around, but it's free for personal/academic use and dead simple to set up.
There's a standalone command line client too [2], but it requires a bit more knowledge of how to tweak the settings, while Aspera and the Globus client does a lot of auto ranging stuff.
In any case, both of them will easily get you line speed from your slowest node.
http://asperasoft.com/technology/transport/fasp/