That last comment was by Andrea Zvaleko. I didn't mean to be anonymous behind my user name.
While it is relatively early in the show that we learn of Diana's delusions, (Jonathan misspoke), it is definitely not as early as 15 minutes. There are seven full length songs beforehand, with lyrics are structured to make the audience believe Gabe is alive. I feel the composer/writer did not intend for the audience to know until the birthday cake and I have honestly been a little heartsick that this was exposed. It's a moment that is supposed to take the audience's breath away. It's the moment when the atmosphere shifts from cautiously lighthearted to dark in one, quick moment. I do really appreciate the positive spin of the review, and have very much appreciated prior reviews, I just wish less detail was exposed.
Re: “Not Normal”
Jonathan is correct. The exact amount of time he has been dead and the full explanation is not revealed until the end of the 2nd act. It's implied somewhat but the complete story doesn't come to light until much later. I realize now that's probably what Jonathan meant by "It isn't explained properly until the end of the 2nd act". These are plot points that are hinted at throughout until the full explanation, which, if we're doing our jobs, the audience is piecing together as the show progresses.