Google has supposedly made severe advances in the last half of the year. Your article's most recent data is September, and much of it is older. It is missing October, November, December.
According to the other article, Google has increased its share quite dramatically, increasing to 43%. That most definitely changes the fact. Google has gained market share last year.
Also, your data is narrower. Like little elvis said, it excludes some sources, only considering ages 15+ at home or work locations. That doesn't necessarily mean Google's share would increase. Perhaps it would decrease when considering other factors.
Again I can find links saying Baidu still had 60%+ in Q4 how can google have 43%+ if Baidu has 60%+?
http://www.seo-hongkong.com/blog/baidu-controls-601-china-search-market-share-in-q4-07-436.html
Another one that is claiming Google was no where near 40%
http://www.marketwatch.com/story/googles-share-of-chinese-search-rises-in-q4-2010-01-13
Look you can find anything you want you can find articles that say Baidu has lost market share since 2008 and you can find articles that say they've gained market share since 2008. Lets not forget though these articles that are putting Google at 40%+ of the Marketshare even though they're really only around 1/3rd or less say they've gained in the last 6 months... that's obviously false because that includes Q3 and Q3 Baidu stomped all over Google.
The reason we're probably seeing so much crap posted in the last day or two is because people are standing behind Google in their stand against "big bad China" so we're going to see things that say they weren't hurting etc etc, but truth is they are losing market share and like I said before the most searched term on Google.cn is Baidu.