I have just found this discussion having been linked from another thread. As a Canadian travelling in FL a lot I can say that it has been an inconveneince, especially with a rental car. The only options were to leave the card behind the counter or to guess how much you wanted in order to pay before pumping.
I belatedly became aware that if I prepaid more than I wanted I could get a refund, as this information was never volunteered by any of the gas stations I went to. I used to leave my card, with a lot of discomfort I might add, until I was a victim of a cloned card. Instead I now prepay my gas with the rental company so it's less of a concern.

Ironically I arrived at that solution due to a different issue iun Victoria BC when I couldn't find a gas station open in the early morning near the airport.

As for US travellers in Canada I accept that you can't necessarily pay at the pump but you can still pump gas without prepaying, at least everywhere I have driven in Western Canada. In the US I can't even get gas without prepaying. with the problems listed before in many other posts. I have never successfully tried the false Zipcode thing but as I said it's a non issue now for myself at least.

I wasn't aware of the problems that US travellers had in Europe without a PIN and chip combo until I read this on another discussion. I can see it being an issue with automated machines with no attendant etc but when in the UK and Holland recently ( as well as Singapore, Hong Kong, Japan and Malaysia) I never had a problem with swiping my Amex which doesn't have a chip. My chipped Visa worked everywhere.