I had a one hour connection yesterday. Our arrival gate changed from something in B to a bus transportation, so I had to wait for the entire plane to de-board into to busses. They brought us to the A terminal. I am lucky that I dashed toward the front of the line when we entered the building, but I still spent 20 minutes in the passport line (only 2 people were working at the desk). I made it to my gate with about 10 minutes to spare; had I not been towards the front of the passport line, I am not sure I would have made it.