Beach House throw it down…as much as a dreamy, lullaby making duo can throw it down…with this live performance of "Myth" on Letterman.In other news, super producer Flying Lotus thinks the Baltimore duo suck, ranting on his Twitter that their newest LP Bloom "feels like i heard this album before a million times already. Its just TOO familiar". Umm, pot-kettle Mr Lotus.What do you think? Is he right?