Christians in the minority?

In some ways (though not all) I agree with Frank Skinner in this article on Christians being in the minority. Here's a couple of good quotes from it:

To many British people, Christianity seems like a weird but unexciting theme park.

Surely the central image of Christianity is someone who can shoot fireballs out of his fingertips allowing himself to be nailed to a wooden cross.

Yes, that Frank Skinner. Will we sing a redeemed version of 'Three lions' in eternity?