I agree but I was still somewhat surprised to see it tbh. Not because it was Tiago, but because doing what he did meant saying screw what the match up says to do and go with the hot hand as you desribed with the Tiago/Tim pairing. That would be a pretty big change from the Pop of old to start doing that.
What we also saw (which many of us have seen before) is that this team's ceiling is pretty damn high with The Big 3 + Tiago playing to the level he is capable of. It's pretty damn ridiculous how good he can be and his defense was also pretty damn good. Not only did he block shots, but he rotated well and did something he had not been doing so well - making guys finish over his length without fouling. If he can do that consistently this team is really, really good assuming the health of the big 3.
While Diaw really helped this tonight and played great, I can't give him all the credit because Tiago also did this vs the Knicks without Diaw playing very well. It certainly helps when one or both of Diaw/Manu are on the court with Tiago, but he's shown some nice growth (albeit in small doses so far) to be a pretty damn good focal point despite who's around him.