Should be very effective.
For a long time, one of my favorite ways to test a big data pipe is to torrent the latest version of a Linux distro. It's a much more visceral and real world experience than going to a speed test site. Seeing an ISO come across in chunks of ten megabytes or more (my current connection tops out at 13 MBps) is very engaging and so much faster than going to any one source. At the same time, watching the peer behavior shows that no one peer is expending a major chunk of bandwidth.
Applying this approach to insuring critical patches get out there even if the original source is swamped seems like a natural.