I got a note back from KP this morning. My author revised draft has "passed the final stages of review." Because of the quick turnaround, I'm guessing their approval is based on some sort of auto-scan.
The rest of the note goes on to say:
Super cool! That's it for now. More to come."Currently, the Kindle Press production team is working on converting your Word doc into a MOBI e-book file for publication on all Kindle devices. We’ll let you know when this stage is complete and we establish a detail page for your title. This process typically takes around 1-2 weeks."