A new router, designed by one of the creators of ARPANET, manages flows of packets instead of only managing individual packets. The router recognizes packets that are following the first and sends them along faster than if it had to route them as individuals. When overloaded, the router can make better choices of which packets to drop.
Read the full thing at http://tech.slashdot.org/story/09/07/10/1830217/New-Router-Manages-Flows-Not-Packets
Why the hell didn't I think of that....