I think not having pulled a pint in your life may be a definite plus factor to be honest, I know of at least 3 couples who have been taken on pretty recently that have no experience whatsoever.
One guy has been taken on in one of their "Flagship" pubs...he had no experience either, mind you to be very fair to the guy he has done well and the beer is blob on, so it doesn't always mean that lack of experience is a bad thing, sometimes enthusiasm can make up for a lot.
Sams currently want people with very little or no experience at all, that way you don't know how bad it is now compared to how good it was to work for Sam's not so long ago.