How can you tell? They never play. Doc only put them in for like 2 minutes at the end of quaters. When they do get time they are so scared to screw up that they are ineffictive.
All that matters is that Danny and Doc can tell because they see them all the time
Also, there's a reason teams are trying to trade for Hickson
It's because he was a top 20 pick in the draft, highly regarded out of college, have seen him excel in Summer League, and have reviewed video of his development in game situations over the last two years
Scouts and GMs are seeing he is a very talented young man
Neither Walker nor Giddens were highly regarded out college
Neither has excelled in the Summer league
Neither has been dominant in the NBDL
Neither has been good enough to crack a rotation
And neither has any video anywhere of them in NBA game situations showing that the get it at this level
Teams aren't bowling themselves over trying to make calls about Giddens and Walker because THEY have determined these players suck and the Celtics management made a mistake in choosing them
The Celtics can't develop them because they aren't good enough to develop
The Celtics(Danny, Doc) did however develop Rondo, Perk, Davis, Powe, West, Gomes, and Jefferson
Why
Because they had something to be developed and Walker and Giddens don't
Want to blast someone, blast Danny for choosing these players instead of Chris Douglas Roberts or Mario Chalmers or Luc Mbah a Moute or Goran Dragic or Nikola Pekovic or Kyle Weaver or DeAndre Jordan
But don't blame Doc and Danny for not developing NBA talent that wasn't NBA talent to begin with
Blame Danny for misjudging that these guys talents were better than players they could have chosen instead