I don't doubt that China is ahead of schedule. In fact, I'd be shocked if China was not in the lead globally on adjusting our energy generation mix. They'll have really clean looking dispatch stacks long before we do in the US, but at what cost? (And I'm not just talking about financial costs here.)
That's what we have to keep in mind. The fact is that addressing climate change is usually much more than a technology problem. How easy those non-technology aspects of the problem are to overcome greatly depend on what you are willing to tolerate from the authorities charged with addressing the climate change issue.