Nitpick: the official name for "Holland" is (The) Netherlands.
Holland actually denotes only a part of the country and a lot of dutchmen do not take kindly to being called a "Hollander".
Holland actually denotes only a part of the country and a lot of dutchmen do not take kindly to being called a "Hollander".
Also: even London2012.com calls the home nation Great Britain, not the United Kingdom.
Secondly, there is a difference. Nowadays, there is only one Germany, so there is no need for clarification. However, people would be offended if someone called it Bayern or Saxony. It surprises me that the team is called GB, given the well-known and IMO better alternative "UK".
Also, the announcers at the Olympics say "the kingdom of the Netherlands". I do not think they do that for e.g. Belgium.