What I can say about several other sites testing servers, some of them are located on the top tier 'channel' of the ISP's network, where little to no real world traffic moves through.
Top that with their default settings utilizing port 8080, which again, is not the default HTTP port, so very little to no traffic moves over those lines. Giving test results in this manner, in my opinion, is good for internal network throughput only. Not necessarily real world is it. As websites and CDN's are scattered all around the planet, not necessarily on the big pipe with little usage. Which of course by logic will give a more consistent reading, considering.