China is the second most powerful country in the world. Do people really think they are that stupid ? They are not going to attack an American company using infrastructure that anyone can track back to them. This Github DDoS has got to be the work of someone trying to frame the Chinese government. Has anyone considered that angle ?
Take a look at this brand new executive order authorizing economical and financial sanctions against global "cyber threats": https://www.whitehouse.gov/blog/2015/04/01/our-latest-tool-c... This GitHub business looks more and more like a false flag operation.
The more that comes out and the more silence there is from the Chinese government the less it looks like a false flag operation. Usually the victim of a false flag operation (China in this case, not github) would be very adamant about its non-involvement and would work very hard to expose the originator.