In connection terms, where the connection is a small doorway:
Internet Explorer is like an over-polite group of people, constantly saying "After you" and not really moving quickly at all
Firefox is an ordered group, getting all the people / connections into a single-file line and being efficient (actually, IE requests faster just with FF in the background)
Chrome is a group of jerks who elbow everyone out of the way, which is great if you're using Chrome, but if too many people on the same network are using it, it's like two people trying to shove through a door at once.