I think that was his (snobbish) point - only mass-produced domestic beer like Bud or Miller is in boxes of 18. Everything else seems to be boxes of 6 or 12.
But that's just not true. In the NE, I can get Smuttynose, Harpoon, Long Trail, Sam Adams, etc in 18 and 24 pack boxes. I have difficulty imagining it's that different for the rest of the country. And whatever you think of those beers, they're certainly not of the Bud/Miller variety.
