Cards on the table, I have a Samsung chip, I also have no problem with the battery life of my 6S or any other issue with it, it's a very fast and reliable phone.
Everyone does need to get a grip here. If you look back to the start of this thread when people were assuming the Samsung chip was better due to the apparently smaller process, there are various people with the Samsung chip smugly claiming that they "knew" they had that chip because their battery was so good. Now it's the other way around and people are blaming their Samsung chips for everything from poor battery life to trouble at home. Someone at geek bench is going to pop up sometime soon with an update to their app (which currently dates back to June and doesn't even claim ios9 compatibility) apologising for the fact that it doesn't work correctly with the Samsung chips, or is overstating performance on TSMC chips, and everyone here is going to end up looking and feeling very silly.
If you have a working phone, great! If you have a rubbish phone that doesn't work the way you want, by all means take it back, but don't take back a working phone just because the name on the chip isn't what you like!
Finally, even in the incredibly unlikely event that the benchmarks are genuine and Apple just never noticed this vast difference between the two chips, this is most likely a firmware issue that will get fixed in 9.1 or later. Apple released one set of specs for this phone, not two, so that is the specs that all these phones have to meet.