Probably a combination of inherent cynicism and lack of credibility in Chinese financial statistics.
You can go to China or some of the surrounding countries (SE Asia, Japan, Australia) and see for yourself. Or look at the sales reports from Apple. The massively growing Chinese middle class is quite a real thing.
Yet the reaction here is of scepticism, disbelief, denial.
I don't understand that.
No other topic (Europe, US, Africa, Middle-east ...) is met with same.
This company just plays the normal MBA playbook in an echo room and every listens without thinking. Just look at the former (some now bankrupt) companies that hired McKinsey. Amongst them Enron and Swissair.
http://www.ritholtz.com/blog/2011/03/is-mckinsey-co-the-root... http://business.time.com/2013/09/10/mass-layoffs-overpaid-ce...