Originally Posted by
amenachem
If I do take the chance (when was the last time a flight was late?

), but still miss my connection, will US show any mercy to a *G for rebooking? My past experience would say no.
I missed my US flight in Orlando a few months ago - I got stuck in traffic and arrived at the check-in desk just as the flight was leaving. All I said was "sorry, I missed my flight, I need to get on the next one" and the guy gave me a BP for the flight that left in an hour and a half.
I'm not sure if US has something like the flat tire rule, but if you only miss it by a short time, I've found that asking nicely usually gets you where you need to go. No guarantees, of course.