OfficialBFish wroteDoes it make any difference that he was the inbounder and never fully seemed to step in bounds after the throw in?
No, his motion off the screen took him further OOB, it was used to his advantage.
Have had a similar discussion before with others, if A2 runs OOB and then comes back in, and AFTER he is back in bounds and established, A1 throws the pass is that a violation? Rule says, " A player who has stepped out of bounds under his own volition and then becomes the first player to touch the ball after returning to the playing court has committed a violation." If the ball is still in A1's hand, then A1 is the first to touch the ball by virtue of the fact that it's still in his hand. So is this a legal play? By the letter of the rule, I think yes, but by the spirit of the rule, I'd say no.