I admit I'm a thousand miles away so I haven't. But there have been numerous reports, obviously from fans, yes, but also some coming from the words of coaches/players that he is doing quite well for his current state.
BTW, calling him a walk-on like he's not worthy probably isn't accurate. Two other scholarship players are also walking on. There's no room on this team so obviously he has to walk on. I'm sure he'd have a scholarship if there was room. Nobody expected this kid to be 6'10 260 either. What was he in HS, 6'6-6'7 215? He goes from a SG/SF body to a C body. That doesn't happen too often.
Honestly I'm not too sure what to think of your post now that you've said who is more skilled. Worthington probably should have gone to play football at Wisconsin, MSU, or Stanford, not basketball at BYU.
You can't teach size and strength. If he learns to play opposite of how his brother played, he could turn out. And I'm sorry, but I don't think a double digit point and/or rebound game is going to be out of reach for him one day.