Yes, in UK and Wales according to national census 2001 390.000 people declared "Jedi" as their religion which made it the 4th largest "religion" in those countries that year.
Let me also elaborate a bit more about the quote of Hubbard as there is a continuation which is pretty interesting I think.
Part one - The Gossip: Another writer Kurt Vonnegut said to Hubbard that yes maybe he is right but it's not possible to create a religion in modern times (it was early 50s of 20th century). Hubbard claimed contrary that it's fairly easy to do it. The conversation between those two gentlemen ended in a 5usd bet. Vonnegut lost. That's the rumor.
Part two - The Fact: On February 18, 1954, the Church of Scientology was officially incorporated in Los Angeles, California, by L. Ron Hubbard.
Thanks by info.
