I haven't seen any comment or quotes yet from Baidu (please correct me if I'm wring!). Amicable high profile departures like this are almost always coordinated between the person leaving and the company, with joint statements. Not saying it's not amicable, but I do find that, and the fact he's not sharing his next move, a little odd.

I also saw a FB thread that seemed to suggest this may have been a surprise to some of his colleagues. Take that with a grain of salt though - I don't know the people on the thread and they were vague. I just got the sense it was news to them.