I've met and interviewed Scott several times over the course of my career. He is the anti-Carol Bartz. He is extremely likeable, approachable. He's a consensus-builder, not a bomb thrower. And he did double PayPal's user base and revenue to 100+ million and $4+ billion respectively. Yahooers will like this guy. He's sharp. He's the right man for the job.
He used to be the CTO so he is also a strong technical person. It's a great fit.