I agree that people are not moving through they way they could/should. I am apalled. I asked my very neutral spouse to voice an opinion and it was that we hope it is not deliberate.
Used to know someone on the Capitol Hill force but don't any longer. What we are seeing is pathetic. They could go through 3 or 4 abreast and still see it all.
It seems to me two lines are going through at once, but you're right....it seems slow and sporadic at times.
I suspect security concerns are limiting the traffic. Sad that it has to be that way, but that's the world in which we live.