You lot make me laugh.
15-24 year olds are worst for leaving up to 5p change. Though I once had someone leave 31p change. Kept it in my till, since the transaction was silent on their part - they didnt tell me to put it in the blind box. This makes up for the 15-24 year old gits who hand me a load of change, and by the time ive finished counting it and its not enough, they're out of the door.
After 25, people tend to wait for change more.
40+ people usually wait for change.
50+ people always wait for change. Even when none is due.
Though in rough / poor areas, people are even more carefree about their copper, which is strange given their lack of money to start with.
I put this down to the fact that these people have an "i dont give a toss" attitude to everything, which is why these areas are so poor in the first place.
Men hate giving cashiers change. If their total is 48p, and they have a pocket full of change and a £10 note, they will choose the £10 note. Women prefer to rid themselves of the change. Older men are more likely to sort through their change though. No matter how long the queue.
Observations of a duty manager. Could be a best seller?