A few points:
1. It's been a unique season, with no practice to speak of, so Johnson and Moore haven't gotten a lot of time.
2. With that said, because Bradley has developed SOME - his ballhandling still is atrocious, but at least that's easily corrected - it does not logically follow that Johnson and Moore will with time, at all. To believe so presupposes that Ainge is never wrong about a draft pick, and his draft record clearly belies that.
3. Age most assuredly matters.
4. As the above poster accurately observes, Johnson hasn't shown me much of anything at this point. He looks as lost as any rookie we've run out there in recent memory. Moore has shown a little more.
We will likely have no choice but to give the two of them another year, since they've developed zero value in the league. With that said, I have NO interest in carrying four or five rookies next season. None.
One would hope that Ainge hits bigger on the two first rounders this year, but there's zero guarantee of that (the three Ainge liked last year in the 1st, and how that's worked out has been rather chilling), and Johnson and Moore get shipped out to the D league to learn how to be pros. Certainly, I would concur with the doubts raised in this thread and on other blogs about the wisdom of the Johnson pick.