Yes, my recollection is there are so few that it's hard to draw clear conclusions. There is some anecdotal evidence, including a study done by some unions and civil liberty groups, that people of certain ethnic origins have been stopped so many times that, to all intents and purposes, they avoid flying now. As I say, that's anecdotal. Those are individual interviews, so you don't know what percentage. Even people with a certain type of name or ethnic origin have been stopped.
On November 18th, 2010. See this statement in context.