Yesterday's business section of El Pais has an interesting article comparing the dining behaviors of various countries in Europe:
Some things make sense just because of geography/climate, like more people go out for breakfast in southern countries where the weather is nice in the morning for more of the year, but some things are pretty interesting clues to character differences and financial security, like Iberians tend to use promotional offers and coupons more than northerners do.
The surprises are that the Dutch tend to eat out most often at night and the Poles most often at mid-day.
Biggest surprise is that it's Turks and Austrians that do the most dining out overall. More than Italians and French, even.