I would argue that many don't look nearly as promising as people think. The current example is Mutala. He is an solid WHL player and he had a decent +1 year. It wasn't great though. He's pretty average in the skill department and he's a below average skater. He's smart and plays well off the puck, with a good work ethic. But I don't see a NHL player in him. He might be an okay AHL player. He's not good enough at anything. Beaucage has an absolute weapon of shot, and he shows a heady game offensively. He also has some major redflags in his game. If you take a look at the failures, you can see some warning signs. Henry had a terrible +1 year and in his draft year disappeared late in the season and playoffs. Barron was a hyped player going into junior, but never really played at an above average level. He couldn't reach PPG as a +2. Anderson was a throwback defensemen in a game that has passed those types by. A complete lack of skill. Shvy is an interesting one, and a player I really thought would make it. His offensive skills were all there. Skating was a much bigger issue than I thought, and if there is a case to be made of a player not getting a chance, he's the guy. It is a trend now though and he still hasn't made an impact in the KHL. Could be the MHL was that bad and a much worse league that people have thought. This continues with a lot of players with the Avs. The guy who I can think of who may have been a miss in development is Meloche.
When it comes to the Avs' top guys down there, it has been Kaut, Bowers, and Timmins. Kaut and Timmins are on the verge of making the Avs and could very well spend this whole season with the team either on the main roster or taxi squad. Bowers is continuing to develop. His warning signs are the ability to actually play center and if he has enough offensive skill in his game to really have an impact. The latter has been a consistent question even going into his draft year. The former was a new issue brought out by the AHL.
Outside of these three that the Avs have been working to develop... who has really had NHL talent? I'd say Greer has NHL talent and the Avs worked hard to develop him... his problem wasn't at the AHL level. His penalties caused him and Bednar to be oil and water. Meloche is another. His skating is a legit issue. I thought it would be overcome, but I don't think you can say he didn't get his chance either... he got solid minutes during his tenure before being moved. With San Jose, he can't find the time of day. Beaudin is another, and I think he still has some NHL skills in his toolbox. He is just incredibly soft and that can really wear on some coaches. The Avs aren't the toughest or most physical team... but up and down the lineup there are very few purely soft players. Girard is, but he makes up for his game elsewhere. Jost isn't so much soft as he is weak. He's willing to battle, just sucks at it.