Honestly, in a blind taste test for most fruits and veggies I generally prefer the flavor of the organic one, and that's enough for me. Maybe it's because of pesticides, maybe it's because of harvesting schedule, maybe it's because of other practices at the organic vs non-organic farm, but the fact is the organic fruits/veggies usually have a noticeably better flavor (not always, especially outside of the dirty dozen). This applies even more so to milk.