1. Age is not a good indicator of what stage of development a player is at. Guys like Towns, Okafor, Turner or Porzingis (all 2 years younger) spent (much) more time playing basketball and developing their skills up to this moment. And Cal sucks at developing, since he gets shiny new toys every year. So the idea is simple: WCS is not so much low-skilled as he is severely underdeveloped. His skill level is currently mediocre, because he started very late and didn't have access to very good coaching. Until last summer he hasn't really worked on his game - that's where talk about "not being interested in the game" comes from in part.
2.
Defensive rebounding rate is useless for predicting rebounding ability in the pros. Offensive rebounding rate is a good indicator though. Up until last summer WCS was 7'/220. That's not even close to your typical rebounding big. WCS still posted 12.2 OReb%. Guys with similar dimensions doesn't do well: John Henson (10.8 OReb%), Ed Davis (10.8 OReb%), Nerlens Noel (10.4 OReb%) or Christian Wood (9.6 OReb%) to name a few. And WCS hasn't really improved his strength, especially core, between freshman and sophomore year. That was another symptom of "not being interested in the game" and actually my main objection, when Baja brought up his name last spring as a "must draft" (he didn't declare).
These two games, especially vs Michigan St, show, how bad he was at keeping position and even his balance just a year ago.
3. Last summer WCS added 20 pounds, got a lot better core strength and balance. So how did he managed to post worse OReb%? Offensive rebounding numbers of WCS this year were suppressed by his role. He spent a lot of time this season being basically boxed out, whenever he was closer than 12 feet to the basket - teams preferred to glue a front court player to him to neutralize allez-oop threat and basically played 4-on-4. In games vs Notre Dame or Wisconsin, for example, Towns was posting without double-team coming from Cauley-Stein's man, even though Connaughton or Hayes were often 3-4 feet from the action. They still had one hand on WCS to not lose touch with him and give up easy basket. Plus this year Wildcats had really bad spacing with Lyles at 3, so Cauley-Stein spent a lot more time away from the basket, than he should've had given his current skillset. Rebounding numbers for moderately physical guys, who were pushed out on perimeter by their roles aren't stellar either: Taj Gibson (11.6 OReb%), Terrence Jones (9.8 OReb%), Anthony Bennett (10.3 OReb%), Adreian Payne (9.5 OReb%), Noah Vonleh (10.8 OReb%) or Myles Turner (7.2 OReb%). Horford and Noah had 11.8 and 12.2 OReb% respectively.
4. Despite great stats it's easily seen in two videos above, how raw WCS was at playing defense just a year ago: overplaying strong hand and getting beat badly (poor balance didn't help), running past shooters on closeouts, because he couldn't slow down, jumping at every fake.
5. Here are his two games vs Florida his sophomore year. Florida was one of the best teams in country last season, and they used NBA SFs at PF spot. WCS didn't get a lot of offensive rebounds, but he was in good position a lot, just didn't get the bounce. And that's before he really worked on his strength, so the notion, that any wing can keep him off the glass, is far from being true.
Anyway WCS is more mobile than half of NBA SFs, so they will have to stay on him the same way college PFs had to. Teams could potentially combat that by rotating guards in front of rolling WCS, but here comes another quality - while not being creative passer he moves the ball very well and on point, so as long as a player rotates on him off of a good shooter, the other team gives up a good open shot either way.
Winslow, theoretically, is exactly the type of small forward that the Kings would need if Rudy Gay were to play the PF spot more frequently. He's a tenacious defender, he's an excellent rebounder (even better than Cauley-Stein), he can shoot, handle in a pinch, decent passer.
That, and wing defense is a discrete need on this team. McLemore is only slightly above average and Gay is awful. And we're not even going to get into Stauskas, Casspi and Williams off the bench.
Out of all energetic wings in the draft (Winslow, Johnson, Dekker and RHJ) Winslow's 5.4OReb% is worst by a margin, and he spent more time at PF than other guys.
Winslow is an active defender, but he's too eager to go help, often losing his own guy completely. Shot is definitely not a given, especially off the dribble.
Gay and Omri are certainly not awful on D.
P.S. One of coaches, that recruited Winslow hard, said, that he doesn't know, what position Justise will play.
http://www.foxsports.com/nba/story/...minnesota-timberwolves-dangelo-russell-060815
P.S. 2 In that first workout video they show Karl telling them something in the end, but it was muted. Wonder why?!