Well, for higher priced items it would be no problem. You buy a car, send the transaction and sit down with the seller drinking a coffee, conversating a bit, until the first confirmation comes in.
In stores, for example expensive clothes or jewelry, I think the shop owner will decide on case by case. A new user buying a $3000 jacket might have to wait for a confirmation, surely will be treated well in that time, but a known custome with money surely can work out of the store fast.
Well, might even be that it becomes a status symbol to be a "nonconfirmer" or something.
Like taking out your platin credit card or so. Impressing the kind of ladies that look somewhat more like ticks. Well, some guys try to show off that way too. In fact one should never take such a girl you practically have to pay to be with you. It's not much more like a whore then. If they only want to fuck them ok...
Well, not the topic anymore I guess.