Linux Updates from Repositories are fine --usually there's just a few MB for updating as most people update specific packages.
My reference to torrents was for people who wanted say entire DVD's etc of a distro -- even OPENSUSE has a torrent stream for downloading (optional) but it keeps the load on the servers minimal - remember a lot of Linux distros have many people working on them who donate their time totally free to the community to keep as much as possible open source.
Some HUGE companies like Red Hat also willingly help out here --the CENTOS system is the same as the RHEL enterprise version that is installed on 100,000's of servers around the world.
Maybe Ms is finally joining the "Real Planet". !!!! -- actually it's WIN WIN since the entire load on Ms's servers will be greatly reduced and more people can get the next releases in a timely fashion too.