http://blog.chron.com/newswatch/2012/03/travelers-report-crowds-delays-at-united-terminal/ Last weekend was a disaster at IAH. More telling than the article are the comments in the comments portion of the thread. Looks like disappearing advance seat assigments due to the integration + typically oversold Spring Break flight led to an absolute disaster. Also didn't help that there were lot of first time passport users on UA/CO that had to use the kiosk instead of online checkin. You can sense the blood boiling just reading through these. Even showing up 3 hours early was a problem. A lot of goodwill lost in a couple of day with the hometown crowd.