It dosen't just affect my connection in terms of latency, it affects it in terms of packet loss, which I shouldn't be getting at all. Show me your netstat -s after a while of eMule being on full saturation. I guarantee that you won't get the same 'segments retransmitted' as me.
See
http://homepage.ntlworld.com/robin.d.h.walker/cmtips/loss.html