The Stig is…

Michael Schumacher?

What do I think?
Probably a PR Stunt to present the Special Guest.
[Also, isn't that black Ferrari FXX that The Stig drove is Schumacher's personal FXX? There is only one black FXX.]

If you look @ the credits at the end of the episode.
Jeremy Clarkson
Richard Hammond
James May & The Stig

Special Guest
Michael Schumacher

Also, the Stig wouldn’t stall in the Suzuki Liana & destroy a video camera/windshield in the process.

Give it a rest. I would rather keep the identity a mystery & this was probably done just so more people can speculate.

A BBC spokesman said: ‘We never comment on speculation as to whom or what the Stig is.’