Thanks for all of the posts about timelines and the meaning of the Eligibility Determined status. Here's my timeline:
1/22/2020 Applied online and completed the interview as a walk-in with Identogo
1/23/2020 Online Status showed Eligibility in Progress
2/16/2020 (Today) Status changed to Eligibility Determined.

I initially thought that the wording of the status details might indicate a problem, until reading the responses here. Based on all I've read, I should receive a KTN very soon--in time for my next flight.

I sure wish that there was a better way to check an actual status, and that it was consistent. With my spotlessly clean background (not even a traffic ticket) and previous detailed fingerprint background checks for both Federal and state purposes, I couldn't imagine why the process took so long, other than my very common name. "Random" seems to be the answer, based on what I read here.

Again, thanks for all of the posts!