I had a similar problem — was the router dlink dir320 with the firmware from the ASUS 500в2. Roger pretty good, powerful at the time, but when downloading torrents also slowed down page loading. As it turned out the problem is not only the width of the channel, and that the processor on the router is loaded under 100% due to a large number of TCP connections, because of this and slowed down page loading. I built a computer as a router and the problem disappeared. When downloading a torrent at full speed, to my perception, the pages load as well as without downloading it(do not think zagruzka videos from YouTube and flash music).