Anecdotes from a thousand websites, blogs, and post,s as well as audio/video testimonies, not to mention the published quotes from the literature bear this out.
The published quotes in the literature, as you explained in the same post, are individual writers attempting to brown-nose and not a reflection of what is really going on. As for the anecdotes you refer to, there are many anecdotes that imply that the GB members, especially GB 2.0, merely go through the motions of their Committee headship and Wednesday morning meetings and that's about it. The old, dying, GB 1.0 members saw who their replacements were going to be and made sure they didn't have power over the corporation. Now, the corporation runs itself and in shielding the GB from legal liability as officers in the corporation, the corporation has also protected itself from the interference of the GB. The changes at the top that have happened over the last dozen years are significant, IMO.
I haven't seen the "anecdotes from a thousand websites" that bear out the idea that the GB rules over all with an iron fist. In fact, it is difficult to find anything about the GB AT ALL on the web, at least anything that isn't a quarter of a century old, and today's corporation and religion are two (actually dozens) of separate legal entities.
I don't think the current Watchtower Society has to do a single thing the GB says unless they want to. When obeying the GB doesn't benefit the corporation any longer, my money is on the corporation to win.