I have no reason to doubt they’re the ages claimed, because I’ve known some really spry folks in their 90’s. On the other hand, I’ve known quite a few people that were broken down and could barely walk in their 60’s, and at the rate I’m going, it’s likely to be me.
There’s really spry, and then there are those two. If they really are in their 90s, they are in fantastic shape and dance better - and more easily - than just about everyone less than half their age.