mpg single vs super six

I've done a ton of research on this and have had both 1bbl's and 2bbl's. My opinion is the 1bbl is capable of getting better mileage than the 2bbl but it's hit and miss. I'd say people average 18-20mpg with a 2bbl and 16-22mpg with a 1bbl. There just seems to be a wider variance with the 1bbl. I prefer my 2bbl setup. I always get 20-22mpg no matter what. It's quicker, doesn't take nearly as long to get up to speed on the freeway and it's just more fun to drive.