Two examples: First, China doubled its life expectancy in a single decade, moving from one of the lowest to being at parity with the developed world. Second, in the early 1980s China implemented policies that moved them from having stagnant GDP per capita to steadily doubling it per decade, a pace it remains on since.
In fact, you could blame some of post revolutionary China's most disasterous events on the lack of bureaucratic inertia. The great leap forward was disasterous not just because the details of the plan were mistaken, but also because it was implemented so instantly and completely.
Anyhow, if you look at the data instead of repeating narratives that personify organizations, you'll see it's not quite so simple as saying that all Chinese economic decision-making can be summarily rejected as lumbering bureaucracy.