I received the Hogan invite on 2 Sept. The email was from a United employee not from the united@airlineapp. I was camping over the long weekend and did not see the email until Labor Day (Monday), took the test the next day (Tuesday) submitting it around 130 in the afternoon. I was incredibly fortunate to receive an invitation to interview at around 1030am Wednesday morning. The invitation was via an email from a different United employee. Hope this is useful.