My T is 44, when I searched for a T I purposely went for someone younger part for connection and part because I wouldn't want someone to spring they were retiring on me
However, I have a friend who sees someone in her 60's and she said she is very motherly lol.......That would probably result in too much transference for me! Even if I desire some mothering ...
I don't think age would affect ability. In fact, if their kids are all grown, they probably have more time to invest in their work if that makes sense. Then there is the experience behind age as well, which can be a benefit, unless they are totally cold and old school.