[vvanders]

Using the term "zero" is not the best choice. UDP packets have the same latency as TCP packets, you're just saving the handshake.

Games and VoIP still have latency, they're usually structured such the data loss and duplicate responses are normal and handled appropriately.

[SmooL]

You're also saving the time of network latency and waiting for a response. With the proxy, once the packets are out on the network, you're done and can move on.

[vvanders]

That's also true in Games and VoIP, only things that need to be reliable have acks for them.