I met Mark on Friday, and when he introduced himself he didn't tell me his age once. However, at least 5 random people told me about how amazing it was that he was so young at various points in the evening. So to be fair to Mark, it must be a somewhat compelling data point because people talk about it even when he's not around.

I think what he's working on and his age is truly impressive. I do however have to agree that the wording actually makes it less impressive than it is and more like a fake plug.

To your original question: yes.

But in this case, he's not exactly flaunting it: it's in his bio which is ok. Plus, he's 17!