NeuroticGuy "If Thibedeau is a defensive master, why would he be unable to formulate a plan (at least some wrinkle) to disrupt the trangle given the time to develop such a game plan and 3 full days to practice its execution? "
It'll be interesting what kind of defensive plan the Celtic coaching staff will come up with. I'm no expert but from all I've heard and read of the Triangle Offense, there are a wide array of possible responses to a given move by the defense. So, if the Triangle is that complex, it must also be hard to anticipate what the offense is going to do. If there are many possible actions the offense can take, then the defense also may need to have just as many ways to react. The more questions on a test, the more material the test can cover. Hence, the more material you have to study. I don't know.
I read that the teams that have defended Chicago's implementation of the triangle well in the past were the Pistons and the Knicks. They played very physical, dirty defense. They were holding, grabbing, bumping, clipping the Chicago players. The goal was probably to delay them, upset their timing, or prevent them from getting to their specific spot, as the triangle is very structured. Like you said, to disrupt the offense. As we can tell looking back on history, that must have been very hard to do, and that NY and Detroit were not completely successfull at it, elsewise, Chicago would not have won all those banners!