While I read several opinions of shock over the finding, personally I think it falls in the "no duh" category. The amount of sunshine and water plants receive, as well as soil quality, determine nutritional value of fruits and vegetables; pesticides... well, not so much. The chemicals keep bugs and such off the plants, but don't really add or subtract anything otherwise.
So why do so many people think that pesticides change the nutritional content?
I have no answer to that question. Maybe the belief stems from our removal from the growth process; generally speaking people don't grow their own food anymore. Maybe it's the media repeating how much better organic food is supposed to be; it something gets repeated enough people tend to believe it.
Either way, food is food, nutritionally speaking.
As for pesticides, both organic and non-organic had levels below the regulated standards. Of course, now people are arguing over the standards, but that's another story.