I'm not going to tear you a new one Ziggy, but I will say that the +/- stat is one of the most deceiving and useless stats in the game. It's nothing more than a general way to tell how much the team scores relative to the other during very small (in Hendo's case) sample sizes.
I'm not too much for the +/- stat when it comes to individuals. All it really tells you what the scoring was like while they were on the floor. It doesn't really offer any insight as to if that individual was the reason why their number was what it was. To me, it's too dependent on the other nine guys on the court. With these "newfangled" stats, I think the PER is the best I know of to look at an individual's worth on the court (perhaps win shares too, if I understood that stat better).
I do think the +/- stat is more useful when looking at groups that play together, though that's also dependent on the group(s) they're facing. But since you put five guys on the floor at once, I'd pay more attention to a specific lineup's +/- than I would just one player's.
All that said, from what I've seen, Hendo is using his athleticism more to his advantage and that'll benefit him playing with a group that LB wants to pressure the ball. That seems to be how LB is using him now. Once Hendo can be a little more reliable on his jumper, he'll earn the PT from LB.
The +/- stat depends on too many things for it to be viable. If we played the Wolves, Pistons, Raptors, and other lower tier teams, we'd not only have more wins, but higher numbers across the board. If Hendo went up against Kobe or Wade instead of backup SG's his +/- would be lower. It's a stat better used to determine the rotations that work best for certain players.
Even still, after 3 games into the season, any stat is going to be dubious.
There are three kinds of lies: lies, damned lies, and statistics
+/- is not a good measure of play, because it can be affected by many other variables. For example say Hendo comes in the game and then suddenly DJ goes off and hits 6 threes in a row. Hendo may have had nothing to do with that if he was on the other side of the play but he will get a huge bump in +/-. Same thing if somebody from the other team goes cold and misses a bunch of shots. It might be because Hendo was playing good D or that could be somebody else man and just luck.
Over a large enough sample size these other variables will average out to some degree but the +/- over three games is mostly worthless.
His actual stats look pretty good and I would rate his play a B or maybe B+ but three games is still to early to tell how the year will go for him.