He really doesn't play it up, but he cannot ignore it. If you look at his official bio, you will notice that Stan is not mentioned for a couple of paragraphs - he discusses his family and his brother in sister in particular.

Speaking as a promoter, I realize that there has to be a curiosity factor.   Nathan does too. He also points out, righfully so, that the family tradition is to create music and everyone does it differently. Stan is different from Garnet, and Nathan is different from both. Yet all come from a similar tradition.