It's common sense, but it's hard to prove.

And if you can't prove it, then why get all wound up about it?

If you and your identical twin ate the same diet, you choosing organic and your twin not, you would most likely not be able to document any overall health benefit to you.

Eat organic because you like the taste, or you like the way it's brought to market, or because you think you look cooler buying organic products. I'm just saying you'll have a hard time proving it's making you healthier.