Interesting, but as with all things on the Internet, sometimes it's fast, sometimes it slows down to a crawl and there is no rhyme or reason to it, so you would really need to run your speed test many times and average over it.

I would run a PPM::InstallPackage(``package'' => $package, ``location'' => $location, ``root'' => $root); command on each of your repositories, noting the time it took to finish it and then remove (PPM::RemovePackage(``package'' => $package, ``force'' => $force)) the package again before testing the next repo.

Other than the download speed, you should also test the search speed of the repository, but strangely enough I did not find an obvious function for it ???