You can't judge Zuckerberg by his Facebook blog. The guy is a complete recluse. Yeah, all he writes is apologies, because he can delegate everything else. But try to find some of the leaked letters he wrote people that he tries to suppress for privacy. Reading them you get the image of an extraordinarily focused mind. He's arrogant, but if you can judge people on the confidence of their writing alone the guy is pretty brilliant.
I saw Altman's speech and was pretty impressed. He doesn't dick around. He's also a more confident speaker than Zuckerberg. But with respect to him, Facebook is better designed (Loopt is horrendously generic), and it's done more to change the web than most web sites. The Facebook Platform changed a lot. Making money isn't the only part of design.