My flight from MCO to DTW was originally "slightly" delayed. Upon arriving at the gate, the Captain spent most of his free time at the ticket counter giving updates to passengers that there was an IT issue that resulted in the GA to manually board the passengers. He said this occurred in DTW, and as it was a 753, it took about 90 minutes for the entire process. He apologized a number of times, but his timing was spot on...about 90 minutes to shut the door to board. I haven't seen anything on this...probably overshadowed by the Noreaster and what is going on in PVR, but thought worth mentioning. I did ask the 360 line to back me up on another flight, just in case, and he commented that agents who don't know the system are struggling right now, but lucky for me he has been around a while. Tough day.