Indeed he did:

https://twitter.com/jack/status/1603945963944480768

>From: 6389be6...<-32e18... at 12/17/22 21:29:54 on wss://nostr-relay.wlvs.space

>---------------

>Howdy Jack. Glad to see you here.

>

>Did you happen to post your pubkey on Twitter so others can find you here?