>You have users here mentioning that since the sales for 6.1 and 6.7 inch size options for smartphones tends to outpace the sales for the smaller devices you’re begging for, it can be assumed that those 6.1 and 6.7 devices are more popular.

I agree with you here.. that is literally the definition of "popular". Yet again though, I'm not sure what point you're making. I did suggest a truth to another poster, which was that people purchasing things doesn't tell you why they're purchasing them. That would be making assumptions. And when you make assumptions, you make mistakes.

I agree with you though that, yes, by definition a thing that is in greater demand is "more popular". So high five there.