I don't think coaching makes me any better judge of athleticism. That's just noticeable because I've watched him play. It would be to anyone. I just happened to watch than your average yarder bc one of his teammates did some skill work with me.
You get this feeling when you watch certain NBA guys close up or especially really good track athletes... like the speed and power of what you're watching is just not human. It's literally AWEsome. Someone like Sid is a really amazing athlete. As are most professional players. But guys like John Wall, Russ, Derrick Jones, Zach Lavine, Daaron fox and some others are just next level in how they elevate, accelerate and get down the floor. Andre is definitely in that boat.
Also Andre's hops are great, but the end to end speed is what will really kill teams. There are few, if any, defenders that are going to be able to keep up with him on a transition run out or a hard back cut. That kind of pressure on help defense makes plays happen... Normally we talk about "gravity" and "geometry" of the defense because of shooters, but Andre can make similar things happen with his ability to get by defenders.
Now tell the kid to make 1000 3s a day until June.