When I search for files on my computer, the highest speed connection I ever find that other people have is T3 or Higher, but when I go to my friend's place (across campus and I'm assuming on the same network) and use his LimeWire, It often finds Ethernet connections as people to downlaod from.

Any ideas on why he gets those while I never do?

We are both using the basic limewire and have no firewalls blocking us. As far as I know, the only difference we have is our location on campus.