I never trust a gate assignment I'm given more than 20 minutes before departure from ORD. The UX gates seem to change every 10 minutes and Mr. EasyUpdate usually leaves several gate change announcements for me. I was in ORD when some lady missed her flight from ORD to CLT because she was coming in from Vietnam or somewhere and trusted the gate on the BP issued before she left Asia.

It used to annoy me that most airlines don't announce connections onboard anymore, but now I'm glad they don't since the sheets are printed before departure and would just cause more confusion.