speculation alert:
i really think kg went from expecting to retire to being back on the nba court within a month. he wasn't physically or mentally prepared. this is why he was so upset with the lack of extra preseason games and time before the season started. he was talking retirement last year if there was a lockout, and he's just not acting the same, let alone producing the same.
i remember one play a few games ago where the ball bounced between him and another player (can't remember who, bass maybe?) and you could see, he really wanted the other guy to go get it. he hesitated, stopped, half started and then hesitated again. he just really did not want to make the extra two strides to grab the ball if he didn't have to.
i can't blame him. there was no risk of turnover in this situation. i just think it shows a definite difference in the way he approaches the game at this point.