It used to bug me, but I've become a much more patient person over the years. I still have my limits just like everyone else, but waiting a little longer in line because somebody is writing a check isn't one of them.
I note that 95% of the time it is an older person. They're simply going about their everyday life as they have been for longer than I've been alive. They also tend to be the type of people that have chosen to slow down and enjoy life instead of rushing from point A to point B every step of the way.
With that said, driving 5mph under the speed limit in front of me still isn't met with that same level of patience. I'm working on it...
Oops, you posted this while I was typing.
But yes, I agree 100%.