Sounds like Clearwire (both in the USA & Ireland, don't know where you are!) are throttling p2p.

http://www.irishisptest.com/forum/cl...broadband.html

http://jut.net/weblog/?p=1150

If you search on Google, you'll find more info.

You could try changing ports to 64049 (or something in the range of 49152 - 65535). In LW tools > options > advanced > firewall config. Change LW's listening port number > apply > ok. If you've got port forwarding set up, you'll have to change the port forwarded to match LW's listening port

Otherwise, there's not too much that you can do. Check out the thread below for info about how to best set up your LW...that might give you a little bit more speed, but no guarantees
Configuring LW for best performance