I agree. Last year pulled in not just the upgraders who like the new exterior design iPhone every 2 years, but also all the non-iPhone users who had been waiting for a larger screen.
Also, there is a bit of a let-down for those customers who have preferred the 'S' iPhone releases.. the 4S and 5S have probably been Apple's best iPhones, but so far it is looking like the 6S doesn't make the leap over the 6 to justify inclusion in that little group.
I think there are people like me, who are sticking with their 5S, as they don't like the 6 series form factor, antenna lines, and sticking out camera!