There’s a lot of focus on the performance of mobile communications given the incredible rate at which mobile is outpacing legacy PC (did you ever think we’d see the day when we called it that?) usage. There’s been tons of research on the topic ranging from the business impact (you really can lose millions of dollars per second of delay) to the technical mechanics of how mobile communications is impacted by traditional factors like bandwidth and RTT. Spoiler: RTT is more of a factor than is bandwidth in improving mobile app performance.