I'm not sure McCullough is ready to be a prime-time, go-to guy right away, but he sure as heck is more skilled offensively than Rakim Christmas ever thought about being.
Competition is a little different I realize in the video above, but the play at the 1:31 mark is something Christmas has never even thought about doing in his life. Two dribbles with his off hand, and finishing with his off hand.
At 2:03, he reverse pivots, squares and blows by his defender and finishes. Again, level of competition I get it - but that's a big-time move for a 6-10 player.
Lastly, when was the last time Christmas caught on the wing, faced up and drilled a 20-foot jumper? Ummmm never (2:08 mark).
Again, I don't think he's by any means ready to be Jabari Parker/Carmelo Anthony. But he's certainly not Rakim Christmas. He is leaps and bounds more skilled than Christmas. The video above is as a junior - so unless he's gotten worse, I'm pretty sure he's at least as good as the video shows.