Well AH yes I have data, as I said in my previous post, we have been testing for 4 years (actually longer than that) and it's MY data on MY farm not someone elses..........so are you calling me a liar? I'm sharing my own personal experiences on this subject and I have absolutely no obligation to "prove" anything to you or anyone else. If you want to have the added expense of narrow rows and it works for you have at it, I could care less.
As for me and our situation, it doesn't pay.

Oh, our latest testing in the last year has been 15's vs 30's. I have planted everything from 7.5 to 38 over the last 32 years.