Not yet. The "Dilation" protocol (which is about 80% implemented) is intended to support WebRTC as a transport layer. IIRC it requires a public server to tell you about your external IP address, but magic-wormhole already has a server that could play that role. Once a side learns its own address, it can send it to the peer (via the encrypted tunnel, through the relay server), and then the WebRTC hole-punching protocol tries to make connections to the peer's public address. When both sides do the same thing at the same time, sometimes you can get a direct connection through the NAT boxes.
We don't have that yet, but the two sides attempt direct connections first (to all the private addresses they can find, which will include a public address if they aren't behind NAT). They both wait a couple of seconds before trying the relay, and the first successful negotiation wins, so in most cases it will use a direct connection if at all possible.
We don't have that yet, but the two sides attempt direct connections first (to all the private addresses they can find, which will include a public address if they aren't behind NAT). They both wait a couple of seconds before trying the relay, and the first successful negotiation wins, so in most cases it will use a direct connection if at all possible.