In hindsight, that “doom-folk” joke by bassist Ted Dwane was a cheeky WTF moment that folk itself likes to throw some elbows more often than not. British achy-string heroes Mumford & Sons have certainly taken abuse from non-believers. Or rather, people who just want to kick the genre in the shins. Funny thing is most of those people are of their own British ilk. The believers on the other hand, they’ll dig on this first taste from Babel (9.25.12), their follow-up to 2009′s break-out Sigh No More. Dubbed “I Will Wait,” it’s not so much a “doom-folk” elbow as it is a familiar breed of bright banjo chug-a-lug everyone swooned over in the first place, that Avett Brothers kiss of grating yearn laced around a battered road tale about lovers and their time away from each other. “I’ll kneel down, know my ground,” wails Mr. Marcus Mumford, as the veritable dashboard slap of a horn section chases its namesake chorus. But are you a believer?