You have to blame Elway for making the John Fox hire, right? He knew what kind of coach he was getting. Both got lucky winning the Peyton sweepstakes and the Broncos sustained high level turnaround (not just a fluky year here and there) happened faster short term because of Peyton. But then, Elway is a God in Broncos country and he can't do any wrong, right? So blame it all on John Fox. Yeah, right!!!
It is a half baked article at best, IMO. Yes, John Fox was not a top 5 coach in the NFL and he made some mistakes but not giving him enough credit for his 4 years with the Broncos is not close to fair, IMO.
If I remember , I believe Irsay tweeted Peyton good wishes in the first Denver Super Bowl. Certainly , as he was interviewed, an opportunity was at hand to wish him well on this Super Bowl publicly. We know he's no shrinking violet on Twitter.
If he brought up retiring as a Colt, why not say publicly that you would hope he went out as a SB Champion. I just find the omission intriguing as to where their relationship may stand. As you said, only those two know for sure.