Grapefruit seedling #1

This grapefruit plant was grown from seed, in theory there's another planted out alongside the road, but I've not been out to check to see if it still survives.

Will the fruit from this taste okay?  It'll be another couple of years before I get the chance to find out, I guess.  Worst comes to worst, I have loose plants to try grafting things like finger limes onto it, if the fruit it bears are not worth eating or giving away.