Slow P2P with Clearwire

I have Clearwire ISP and have verified my actual download speed to be about 380 KB/s. When I use a P2P fileshare program, however, my speed for downloading music is about 5-15 K.

I understand that Clearwire blocks some ports but I have verified that this port is not blocked and I am able to download, it is just very slow.

Does anyone know if Clearwire is obstructing P2P traffic to inhibit users from this?