Dead Weather vocal recording technique

Bought tickets for the Dead Weather gig today so was listening intently to their album to justify the purchase to myself and really liked the vocal recording technique on 60 Feet Tall.  There’s a delayed second vocal panned very hard right and i wonder whether it’s delay or just a second take that’s been lain down slightly after the main vocal.  I am going to have a go at this on a new song I’m recording at the moment called Murcielago (bat in Spanish).