I have been eating store bought Kadotas and Black Missions.
They're alright, but you know? They are just not very top fruits, particularly the Kadotas. There are plenty of things that gives very sweet fruit, with much more flavor, like sapodillas, or muscadine grapes, or even the small dogwood fruits!
Now, I also managed to pick a barely mature Petite Negri or two today. Those things frickin' blows that supersweet stuff away, goodness gracious, but that's a top fruit!