According to Gene Robinson, at least.

From here:

The Archbishop of Canterbury has been accused of  being ‘abducted by aliens’  over the issue of homosexual clergy.

Controversial American Anglican bishop Gene Robinson condemned Dr Rowan Williams for failing to stop internal rows over the ordination of women and gay priests.

The Bishop of New Hampshire said: ‘I pray for him every day.

‘I have clergy friends who literally studied at  Archbishop Williams’  feet and who have said to me it is almost as if aliens have come and taken Rowan away from us.

‘They have left something that looks like him but we don’t recognise him any more.

This can’t be true: if aliens had abducted Rowan, they would have replaced him with someone whose looks would allow him to pass for a normal human specimen.