While it’s still quite a bit slower than TCP, i’m able achieve about ~300Mbit/s over my local Wifi which is usually saturated at ~550Mbit/s using TCP. This may sound bad, but it’s also an unfair comparison as TCP is better fitted for LAN connections. QUIC rather fills the gap between TCP and relays for external connections, providing direct connections via UDP holepunching even when both devices are behind firewalls beyond your control.
Thanks to the developers in general and @AudriusButkevicius in particular for improving connection speed and holepunching in the last releases 