My Pretos were very late this year, the first ones ripened for labor day, I guess I shouldn't complain but there are about 10 green ones left on the tree. There are also 5 that are close to ripe and more colored and swollen than the one in your pucture. They have been quite good this year, though the later the season the longer they take to ripen. My leaves are still as green as could be here in 7b, so maybe there is hope for the stragglers. I think you will be able to taste one at least. Wait for the skin the develop splits, they also drip honey when the weather cooperates.