Rather than hijack a thread, gonna start with a reply to Carlos regarding balancing a tree or plants foliar/root production with the fruit. Using my young Oro Negro as an example......
I would remove most if not all of them. Don't give in to the pressure!
I understand, but again, I think dropping or retaining fruit is a grower's call based on the vigor and mass of roots and foliage no matter if it's a pecan tree, peach, mango or avocado. There is no black and white protocol when it comes to gardening IMO.....you have to learn to read your plants. They'll tell what they need if you're smart enough to observe and "listen". If they're weak, then by all means drop their fruit.
I have excellent, very vigorous roots and foliage with a huge flush of foliage going on, so I think it can support the fruit. I'll wait until the first cold snap which means the heat's gone for 2013 and done it's dirty deeds (dropped fruit), and then make another call.
Bottom line, a grower must learn how to balance his fruit load with the vigor, health, root mass and foliar mass of his plant material. Give you an example, I also grow wine grapes and if I have a wimpy vine I make sure and drop all of its young clusters so that the vines resources can rebuild that vine. I have almost killed vines by overloading them. Takes a long time to recover too. Same with peaches but I let my gusty winds knock the fruit off and about 60% is dropped by the winds. My wimpy looking Gwen is one precocious mom and it took me forever to pluck all the blossoms off it. Now it's exploding with new foliage where it was pretty much a bare little tree while blooming.
Just took these photos of an Oro Negro that was planted last March in my greenhouse in bottomless RootBuilder pots. It has 24 beautiful fruit. Discussion welcome!
Mark