I've lived in China 5 years now and our skill levels are comparable so I'm pretty impressed. It's really just basic conversation but the Chinese people will love him for getting this far with it. This along with move to join Tsinghua board will create massive goodwill for FB.
oh man, this doesn't give me much hope. I'm visiting China next fall and was hoping I could have a good handle on the basics by then. I'm learning via Pimsleur and right now I can only say strange phrases like "Would you like to go to the hotel with me?" and "How much money?" I'm joking slightly, I've learned a little bit more than that. But I swear Pimsleur targets their lessons at single men trying to meet foreigne…
Languages are vast oceans of meaning and composition -- 90 hours simply is not enough for Chinese (or any language, really, reality itself is too complex to describe with a system that simple).
I'd recommend learning the characters using Heisig's Remembering the Hanzi (this should take about 100-200 hours), and then shifting to HSK (which should be pretty easy post-character learning) + full sentences.
If you like Pimsleur, keep with it, although I get made fun of for sounding like a northerner a bit from using it for pronunciation help when I was beginning. :)