It's minor semantics, but I feel line jumping (or talking on the phone or balancing the checkbook) is "inconsiderate", not necessarily "rude". While not a fan of line jumping, I'm glad the store finally recognized a need to open that additional line. Sure I wish I'd be the first in that new line sometimes, but I hope the store recognizes that pattern and is ready to open that line sooner next time. That's one of my pet peeves... why does it seem like a surprise to some stores that there is a rush at the checkout lines during the hour after work shifts or lunch hour? When the line is 5-6 people deep, and the express lane is not open, it gets a little nerve racking if I'll make it back to work in time or get to an evening meeting or game in that limited window.