and also Boris,
James Harden averaged a little less than 17ppg last year coming off the bench when he was with OKC. As the #1 guy in Houston, he's avging a little over 25ppg.
I think we're saying that in a similar situation, JG would do similar things. I think 25ppg for Jeff is a stretch, yes. But I think 20-22 for JG as a starter, assuming he's next to Rondo, shouldn't be a tough task. Especially if there's no KG or PP to defer to. He becomes that (second) guy.
In order for JG to score 22 points per game next year, scoring at exactly the pace he did in this year's playoffs, he would need to play 47 minutes per game.
It's unrealistic to project Green's scoring for the regular season based on playoff ppg because he was playing 43 minutes per game - which exactly no one in the league did last year in the regular season. Deng led in mpg at 38.7. And Carmelo led the league in scoring playing 37 minutes per game.
So to answer your earlier question, no, of course the scoring title is not based on per-36 scoring. But a per-36 pace gives you a more realistic idea about how much someone will score during the regular season than does a per-43 output.