Funny you should ask. Being inspired by Tor's Jacob Applebaum's keynote at #29C3 ( http://isoc-ny.org/p2/4650 ) I started a tor node. Without throttling the effect on my box was similar to bittorrent : instantly dozens of connections consuming in total 4-5 MB/s inwards and outwards. Observed in iptraf. ssh felt a bit laggy.

I think much depends on your exit a policy. If you allow all no port restrictions (default) you might be serving a lot, perhaps even bit torrent;

I saw a headline somewhere about ways to circumvent tor policy to run torrents.

SO unbloated devices may be keen on unbloating to still live with being generous to tor which is very important for the project as the main issue with it is it's slowness.

Maciej