[Swordmaker]

Yes, 6s does. And Siri often interrupts me before I can get more than two words out. But it’s still an awesome phone.

That's not the Touch Disease. The 6S is not susceptible to the Touch Disease. . . yet. It may in the future. All modern electronics use non-lead solder that can grow Tin Whiskers which is the real cause of this.

Touch Disease is only a problem for a few older model iPhone 6 models, not the 6S. You may have another problem.

[Gene Eric]

Probably. Calluses might be a factor.

[Elderberry]

All modern electronics use non-lead solder that can grow Tin Whiskers which is the real cause of this.

That's not how Apple describes it:

Colloquially called "touch disease," the issue appears to stem from failure of the chips that translate the user's touch to information the iPhone can use. These controller chips are sometimes failing outright, and in other cases the microscopic solder joints connecting each chip to the motherboard are breaking, causing the progressive failures.

http://appleinsider.com/articles/16/08/26/sources-iphone-6-series-touch-disease-now-accounting-for-about-11%-of-apple-store-repairs