I was aware of Mark Zuckerberg's comment which is why I brought up my age.
“I want to stress the importance of being young and technical,” he said. “Young people are just smarter. Why are most chess masters under 30? I don’t know. Young people just have simpler lives.” -- Mark Zuckerberg, Stanford University in 2007
https://www.quora.com/Is-that-true-that-Mark-Zuckerberg-dont...
Edit: I believe you when you say you don't age discriminate. That's because everyone is watching everyone else, including internal lawyers, to make sure you don't so as to avoid law suits. However, the person that called me was on a private phone call with me that wasn't being recorded, so they could get away with it.
Not trying to say its true or false... Just saying that it's no different than race or gender.