I agree, I think some of his jokes could potentially work if they were properly delivered. A good example of this would be in Patton Oswalt's Special, My Weakness Is Strong.
https://youtube.com/watch?v=Ia8F5kvhx6IThe example is only one minute in, (although I highly recommend watching the whole hour long special, it's great) where Oswalt tells an
autocorrect joke, something Black constantly tells but fails at. It's also a ridiculously basic one, basically he tried to text "I love you" to his wife but it autocorrected to "I hate". But, what makes it work is his whole delivery of the joke, which is something that Twitter lacks with its character limit.
Unfortunately, I also get the sense that, since he really seems to love these kind of Twitter jokes, his standup would be just him reading tweets off his phone.