We have a busy network and only saw occasional problems. We don't download a lot though, so it's hard to say just yet. If a Torrent download affects your network now, it will probably cause problems with an Id.
To Jim and RJM:
Jim, your network was probably busy with
intra-office networking, right? Most internet connections are not fast enough to saturate a 56 Mbps wireless network, but file transfers
within the network certainly can.
So if a 10 Mbps
internet connection is saturated with torrent downloads, that still leaves plenty of headroom for sending music on a 56 Mbps wireless network. I doubt the ID would suffer from lack of bandwidth in most users' homes. Dropouts and interference is another matter of course.
If, however, you're streaming video or doing file transfers
within the network, hence using the full 56 Mbps bandwidth, you may run into trouble.