This is definitely true - after I cleared T9 with my static, we had every step of the fight down to muscle memory and we're very confident with how to do it. The first time I PFed it to get a clear for a couple of friends though, this phenomenon became in-your-face obvious - nobody could agree on a strategy for meteors and golems and suddenly you have people ragequitting left and right. 'Tis a shame that people refuse to put in a tiny bit of effort into planning before you pull and see how it goes.