Please read the article to the end: "We have decided we are no longer willing to continue censoring our results on Google.cn, and so over the next few weeks we will be discussing with the Chinese government the basis on which we could operate an unfiltered search engine within the law, if at all. We recognize that this may well mean having to shut down Google.cn, and potentially our offices in China.". So no, they aren't willing to censor more. Wether they have more market share is an entirely different matter. It's about the decision to pull out of China. This could be the right or the wrong decision, only the future knows, but the decision has a big symbolic significance, that's what everyone is astonished about.