"People always ask me if I was born with this ability. The short answer is no."
No? Well then, I'm confused. I thought Daniel Tammet was an autistic synaesthete savant. Aren't those things that a person is born with? Something isn't right here.
One book about Daniel Tammet includes this and many many more links to enlightening information about Daniel Tammet. What is to be believed about Daniel Tammet? Not much, I'd say.
Daniel Tammet: the Boy with the Incredible Story