Whoa there. The quote can be interpreted two ways; the way you read it ("young, driven, intelligent" = "mentality and intellect of an A Player") and the way I read it ("mentality and intellect of an A Player. In addition, he was young, driven...")
There's no legal upside to publicly being interested in young people. The best you can really do is look for inexperienced people with low salary requirements.
Either way, "young" is surrounded by a bunch of other clearly desirable attributes. Were I a litigious applicant over 40, I would find that significant.
Young has nothing to do with mentality or intellect. Nice to hear someone who is in charge of hiring be honest and say it out loud though.