I don't understand this. Pierce didn't slam OMGPOP, from what I have read, just Zynga's unwillingness to exempt his personal project from its IP clutches. I have to wonder why OMGPOP's CEO felt the need to do this.
Shay probably didn't have a lot at stake and it was just a job, as a leader it's a sign of leadership failure if your troops don't follow you which is what the CEO is likely insecure about. He's also working at Zynga and who knows what the management team will think next week about what OMGPOP really contributed to Zynga.
Both of them look incredibly insecure, but Mr. Porter is the guy with $200 mm in the bank who is expected to show some class. If Shay's weak why even pay attention, just smile that you avoided bringing a weak link with you.