I'm afraid he's mostly right. If anything it de-syncs real bad sometimes. Say the other person on the other end of a call has minor latency and you're looking at a 10 second ish delay, not to mention the constant Skype background "shhhhhhhhhhhhhhhhhhhhhhewwwww wwwwwweshhhhhhh" everyone gets.
TP and Vent don't do this so, yeah.