Supposedly the app and website to check which CPU are benign, but I'd still be cautious. I thought someone mentioned you could also check via Settings. I don't have an iPhone yet so I can't be sure.
I've been scrolling thru the reddit post and macrumors and it seems before this battery life issue everyone wanted a Samsung chip, now everyone seems to want a TSMC.
I'm not due for a new phone until November, so I have time for this to shake out. Funny thing is, I am planning to switch to an iPhone because I'm tired of all the issues and problems I've had with my various Android phones. Now with the CPU controversy, problems with 9.0.x and other issues I'm reading about, it makes me wonder if Apple is slipping. The whole point of switching was getting a quality phone that "just works" and that doesn't seem to be the case anymore.
Macrumor thread:
http://forums.macrumors.com/threads/which-chip-does-your-6s-6s-have.1922967/page-22