No, it should be immediate. I see two possible additional issues:
(1) Your name has a space in the JSON. Use an underscore. I would also reduce everything to lower case.
(2) Add that exact name to your client NIP-05 field. Currently, you just have tomgag.net. It should be something like tom@tomgag.net where "tom" matches the name you input into that JSON.
I'm trying to follow https://github.com/nostr-protocol/nips/blob/master/05.md in particular at the section "Showing just the domain as an identifier" so I use _@tomgag.net in my profile's NIP-05 field. Basically I would like people to tag me with @tomgag.net rather than something@tomgag.net . Am I doing it wrong?
I've never used the bare domain, so you might have to experiment. As I read NIP-05, bare domain support is not a "must," so it might not be supported by all clients. Not sure what you'd place in the JSON name field. Just an underscore, maybe?
