Nominet, the UK registrar, published the results of a poll that found:
More than three-quarters (77%) of British consumers prefer to use a .uk rather than a .com when searching for information on the Internet.
Clearly, you have to hold these numbers at arm’s length. But I would agree in general that people have an affinity for their country codes. And any company that is planning to localize for the UK would be wise to use .uk.