its happened a few times, the longest was just over 2 months, but there were extenuating circumstances.
i was on a combo work/vacation to a country with no Apple retail presence and i always reported my issues with explanation and pictures while I was in the return period.
everytime they've extended the return period till i got back.
however the last time was a few years back when IT contracts had "paycation" work rather than the remote service i now typically do, so who knows if Apple still does this.