Yes, apparently I do
My eldest GD told me to stop driving like an old granny (I was doing 40mph at the time - well, the car was anyway) and no, it didn't annoy me but more amused me.
Unless there are posted speed restrictions, I tend to let the road and weather conditions dictate how fast I will drive - something that youngsters don't always get to grips with and that may explain their irritation with older people.
Having said that, I think we have probably all seen, or been stuck behind someone, that never goes above 20mph regardless of the speed limit and that it irritating and dangerous if it forces other drivers to take reckless manouvres to be able to get past them.