Comcast is screwing me! Please help! in HELP! With Tests Posted January 16, 2015 · Report reply So I've been testing our office Comcast Business 150/20 recently, and it's been performing adequately. Single-thread TMN downloads I can't get to go above ~108 Mbps for the average, but they do peak at close to 150. We can consistently fill it up with multi-thread downloads, and almost get to 170 (testing our own CDN and other third-party downloads). This is good for us, but alas I don't have room to complain to Comcast about performance. Still, it does indicate that TMN measures various Comcast connections reliably.