Originally Posted by Bonehead

Could be, but I checked the list and he wasn't noted as an upgrade. When I jokingly accused him of buying a FC seat, he told me that he always Y-upped on that particular flight. Since he is on that flight every week, I took him at his word. He specifically said that his company would not reimburse him for the purchase of a FC ticket, even if it was less expensive than a "Y" fare.

Relative to the "bucket" that Y-ups come from (if any), note that mileage upgrades (which come from the "F" bucket) may NOT be available on flights that can be Y-upped (I just checked DEN-EWR on 11-7-2008). This suggests that some Y-ups do not come from the "F" bucket. Since Scott indicated that the Gold mentioned in the OP was upgraded via EUA at the 5-day window, he was likely assigned a seat from the "F" bucket, and may well appear on the PDA site's "upgraded" cohort.

It may be that some Y-ups do appear as upgrades, whereas others do not.