I hate it too. That is why everytime I go to WF now and start talking with one of the employees at the produce section and ask them "is this nectarine juicy and sweet?" (it was nectarine last week), to which they will ALWAYS, ALWAYS insist to cut up some for me to try right them and there. They are also pretty honest about their opinion ("oh, I didn't like this peach much. It is not very juicy" etc)
The nectarines were delicious and I bought some for my DD who loved. I don't always ask about strawberries or blueberries or grapes, but I used to have so much bad luck with some fruits such as nectarines, plums, peaches, pineapples, (and some others), that now I always ask.