Not precisely...see my 6+ is one of those stuck in AT&T preorder purgatory. But what's been happening is I've become much more aware of how much the 5s is always with me, and on me vs. tucked away in a purse. I've taken it for granted a lot the past year, mainly because I honestly disliked it after giving up the even more comfortably pocketable 4s. Now...I'm about to give up all hope of pocket-ability and move to an entirely different paradigm. I kind of need to. I'm 48 and my vision isn't getting any better and so I am going to appreciate the larger screen for GPS navigation and texting and emails.
So anyway I've come to a better appreciation of my 5s after a year of grudging acceptance. Come what may with the 6+, I do know I'll miss the 5s, just like I still miss my 4s. If money weren't a factor, I'd keep the 5s running, too. But there can be only one.