For those of us (me, Justin, BRF at least) who've gotten that "Deeerrrrrrrrppppppp...we don't know what's what with you?!!!" message, this article has a bit of insight -- https://finance.yahoo.com/news/stimulus-check-tracker-whats-payment-131737776.html
One of the reasons given is simply that they're still adding people to the tool, so if you're in the same category as me (and, I think, Justin) and pay at this time, they're probably still putting together info as to when you'll be getting the physical check. Which I think I read comes out in inverse order of your financial status, so poors get their check first and people at the top end of the spectrum won't get there's until, I think, late summer or early fall. At least, they're saying people get added to that tool on a daily basis, so I guess we'll have to keep checking to see what's happening.
Which means that whenever I get mine, I'll have to wait a little while to say I did in order to look more successful! Or just be like Tiernan and brag I'm so loaded I didn't even get anything. While completely blowing my cover because I'm acting like crab salad is the be-all, end-all feast for us elites.