I'm not a regular "torrenter", but I use µTorrent occasionally to download large files quickly (the Ubuntu CD, for instance). While µTorrent is running, my internet seems to slow down to a crawl. I get about a half-second delay with games, loading web pages takes much longer, and Skype conversations break up every once in a while. Why is this? It's not a huge deal since I don't have it running 24/7, but I'm just curious as to why I can get super-fast downloads in µTorrent, yet have the rest of my internet-based apps take a significant performance hit.
Also, if this is perhaps something specific to my router or my internet connection, I would like to find a solution or workaround.