Out of curiosity: For those of you that do not like the 13 gram increase of the iPhone 6s compared to last year's iPhone 6 (20g for the Plus), Do you currently have a case on your phone? If you're getting a 6s/Plus, do you plan on getting a case for it?
While the majority of iPhones I see out in public have cases on them, I won't dispute the fact that there are people who prefer having a naked phone.
Some of the more common and/or "lightweight" cases for the iPhone 6:
iPhone 6 Silicone case:
17 grams
Incipio feather for iPhone 6:
0.7oz = 19.8 grams
Griffin Reveal for iPhone 6:
1.2oz = 34 grams
Otterbox Defender for iPhone 6:
70 grams
Mophie Juice Pack Air for iPhone 6:
3.5oz = 99.22 grams
Also, for comparison: A single US nickel is
5 grams.
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Edit/Add:
I currently have an Apple Leather case on my iPhone 6, which should weigh more than the silicone one. I just now took it off and holding the phone, I noticed the change in size and "grippiness", not so much the change in weight.
In my pocket, again it feels "smaller", but not so much lighter.
Like HEK said, we're all just arguing opinions at this point.