We were at the Poly 12/4-12/9, we ate breakfast there 2 mornings and unfortunately did not have any ADRs, we were eating late 9:30 one day and 10:00 the next, so we thought there would be no wait....not true, on Wednesday and Thursday we had a 1/2 hour to 45 minute wait.
The breakfast was great, but it seems like they were kind of short handed, so even though there were tables available they were not seating people as quickly as they could have. Once we were seated, we did have good service.
I would make an ADR if I were you.