I just saw Noah and the Whale on Jools Holland and I couldn't believe how annoying the lead singer was. Great band, but what a grating voice on this guy.
Having said that, you can't base anything about a band on the television mix of a live performance. He could have a perfectly decent voice and he could have been having an off night. Jools Holland is a tough place to play because it is in the round, there's a live audience, and you're in the hands of the television sound mixing crew.
Someone somewhere owes an explanation, however. You can't just break up and not tell people exactly why you're blowing everything up. You have to dish that out. It is rude to leave people hanging, especially if they've been stealing your music for years and years.