Well, while it's not proof by itself, there was only 1 defensive holding call the entire game for both teams.....the one at the end. In fact there weren't a lot of pentalties called period, 9 total. Of that 9, only 3 were judgement calls. 6 were offsides/false starts/delay of game, the other 3 were OPI/hands to the face/Defensive holding. All 3 of those were against Philly, and of those 3 I'd say only actually 2 were really judgment calls because hands to the face is pretty blatant.
So just from the stats, one could make the argument that it seemed like they were letting them play. Without being able to review the whole game with multiple angles I can't see if it truly was they were swallowing their whistle the whole game, neither team truly committed any other holding penalties, or somewhere in between (probably the right answer).
So I'll grant you it is more of a feeling than fact that it's odd they called something that wasn't completely eregious in the final minutes when it at least felt like they weren't calling ticky tack penalties the entire game. But I'll admit at the moment, I have no real video proof to back that up.