I didn't mean to imply that the band currently only appeal to people over 40 (I am 29 myself), just that if they are looking to expand to a new audience that aren't already familiar with them, going with a mature-age style public image might not help the cause.
This new picture (and granted it is only one picture and may be no real indication of the public image they are looking to project), just makes me think they are about to go out to Sunday lunch, rather than they are about to go play a rock show.