Johnny Ringo said:Everything links back to the company. Every major villain, hero or event. And in a universe shrinking move even more of the major players are related to each other, Flint being Claires uncle along with Peter and Sylar...
Considering that Arthur hired the doctor who originally discovered how to give everyone their powers, this doesn't surprise me. Remember that Tracy asked another doctor if he knew her and his response was "I created you". So again, how many of them had their powers given to them and how many had them at birth? I'm inclined to believe that at least half the Patrelli family had their powers given to them.