I'd seen an article about these. They developed a super-sweet table grape that's supposed to taste like cotton candy! My wife found them in a store yesterday and bought a bunch.
And guess what? They really do! The first bite makes you go "Wow, that actually tastes like cotton candy!" You still get that spun-sugar flavor with the second grape, but by about the third grape you don't taste it so much, and they just taste like very sweet grapes. Wait about 15 minutes, then try it again!
They cost a little more than regular grapes, but they're a fun novelty. My daughter and her friends just about finished this bag before Lisa stopped them and saved some for me.