yep - then they look a bit embarassed and correct to Euro. But then we seem to like referring to a "few yoyos" regular enough too. I guess as a country we don't like to leave behind old friends such as "a few quid", or even "a few bob" (which dates to pre-decimal!).
People have been using quid in its updated sense from shortly after the introduction of the euro.
It was confusing initially as it wasn't clear if it was old money or euros that they meant.
Now if only we could get more people saying "twenty-O-six" instead of "two thousand and six".