Interesting. About Belgium, they say:
When dining with business associates in Belgium, relax and enjoy yourself. Meals are an important social and cultural event. Most Belgians are thrifty and do not like waste; finishing one's food is expected.
Can't vouch for any of the other countries, but that one's definitely true. Not too sure if we're thrifty overall, but finishing one's food is definitely a must.
About Scotland:
When in Scotland, remember to refer to the people as "Scots"or "Scotsmen." The word "Scotch" refers only to a drink. Never call a kilt a skirt, and avoid making jokes about this formal Scottish attire, which is often worn by both men and women. The Scots tend to be reserved people; handshakes are generally light, and hugging is not common, even among close friends.
Any of the Scots want to confirm or deny this?