I think this contributes to the overcrowding. If folks are not leaving 45 min after being seated then they cram too many in there. No excuse for that mind you, just a reason when sometimes it's slammed with bodies and other times, the proper amount are there. I wonder if the system is such that those doing the seating only see that X party has been there 45 min, and it shows them it's time to put someone else at that table. Rather than the more common system where someone manually tags the table as available.
One thing I've found they were very strict with is the 2 drinks per person. First time in there, on opening day, we were seated, served timely, etc. We were in there less than 45 min and had time for 1 more drink but after our 2nd one, we were given our check. Didn't ask for it, just given it. Were not "allowed" to order more. Though allowed seems like the wrong word. Other times we've been we were again, given our check after 2 drinks. Maybe this will change as time goes by and it's less popular in there.