Speaking of DCC in the US, apparently this is not uncommon. I saw it at Marshalls where the very dull screen all of a sudden went rich with colors show the US flag and the country flag of card issuance (for the two options, pay in USD or via a conversion rate). The unfavorable conversion rate was over 4% extra from the standard exchange rate all listed on one screen (well, the unfavorable rate that is). It was easy to choose local currency (USD), but still sad to see.