Well I been there during this time period you mention and they been checking. Let me just clarify my observations. If you have your hands full(bags,luggage,baby,etc.) you probably won't be asked for your passport or pass card right outside the building. And then it seems like the Border Patrol guy is playing outside. Letting 20 people pass by and the 21st person is asked.
So yes in this sense they haven't been asking for your passport or pass card. It depends how you see it. I get asked and when I get asked I always stop the line because I refuse to have my passport at hand. And then all that idiot wants to see is my passport and not even the picture. What the hell is that?