Wow that's great! I wasn't sure what your result would be but I'm extremely surprised. I'm on a 50/20Mbps connection and it peaks this with ease.
Since using this tweak in conjunction with OpenVPN, it was the only setting that improved throughput to 95-100% of WAN line speed.
up_threshold
-means the CPU needs to be on average more than 35% in use to decide that the CPU frequency needs to be increased
sampling_down_factor
-improves performance by reducing the overhead of load evaluation and helping the CPU stay at its top speed when truly busy
more info here: https://www.kernel.org/doc/Documentation/cpu-freq/governors.txt