Sensationalist news articles that quote unknown economic groups are hardly a 'source of truth'. I'll stick with the officially reported numbers (from the IMF[1]) until someone successfully proves they are false.
[1] http://en.wikipedia.org/wiki/List_of_sovereign_states_by_pub...
Ah, how we fail to learn from history. It isn't as if we don't have decades of experience pointing out how "Communist government" and "gamed economic numbers" go together like chocolate and peanut butter. Remember how the USSR was a raging economic lion that was going to "bury us" through their amazingly productive economic practices and we were doomed, doomed, doomed before their mighty centralized economic might, until it was revealed that they were basically a third-world country with nukes and a credulous Western cheerleading squad? Maybe not, maybe you're too young, but I'd suggest spending some time with that chunk of history. It has a lot to say about China today. Way more than the credulous cheerleading squad would like to admit.
Nobody got out of the last decade unscathed, China just covered it up better. Nobody's getting out of this one unscathed, either.