Maybe not genetically superior, but certainly culturally stronger. Old people have old ways of thinking.
There are people who resist change and disapprove of all viewpoints other their own, but I doubt it's an age thing. I see a lot of young people opposing gay marriages for instance.
Ideas tend to propagate in generations - it's often necessary for the old guard to die off before a new idea will be accepted, whether this is in art, or science, or politics or whatever.
As new people crop up that aren't reputationally invested in a certain idea it allows more ideas to be considered seriously, etc.
Good to see ageism is alive and well.
I know a guy who did a bunch of market research for a senior care product. They found technology use, on average, dips in the 60s and then starts increasing again in the seventies.