Yes, we are all older since this thread started! 56 here. That sounds old to me, but I don't feel it, despite all of my various sports related injuries, aches, etc.
Although I wish I could be faster on my bike, I realize that I am comparing myself to probably the top 5% of the population in terms of athletic ability, who are my age. All I have to do is think about my "regular" friends trying to do what I do.