For another anecdote, on my $70/mo cable connection, I have a total of 768k for my upload bandwidth, and Spotify saturates my connection so much that I literally cannot watch something on Netflix with my PS3 or Roku box until I have quit the Spotify client on my desktop.

And speaking as a paying customer ($20/mo so my wife and I can each have mobile access), it would be really nice if I could at least choose a limit on the P2P bandwidth so that I wouldn't be forced to close it altogether.