Stern is the best at this - show the game, ship a version of the game within 30 days (albeit with incomplete code)
Spooky is next - show the game, ship the game within 3 months (ACNC)
CGC - I guess they haven't technically shown the game, so I'm not sure how to categorize.
JJP - for whatever reason, DI was the only decent reveal to ship time so far in their lineup. The other 3 have been multiyear waits.