So, the proof wasn’t proof at all, but rather, evidence that Microsoft either is using HTTP 1.1’s persistent connections, or that the company actually reads old proposals for making Internet communications faster, and then implements them to make its products better than the competition. I haven’t done a packet capture on the conversations between IE and various webservers yet, so I’m not sure which it is; I’m just embarrassed that I bought into the “evil empire” argument, if only for a few days.