What is the normal amount of jitter for xfinity?

I just switch to Xfinity from FiOS which became UNUSEABLE (20% packet loss anytime someone was on the network doing something else) and they refused to help me. So I just switched to Xfinity and I'm loving it so far. I know people like to hate on the Xfinity support but trust me, its LEAGUES ahead of VZ's.  Anyway I'm happy with my service so far, but I do have one question. 

What is the average ping / jitter look like with Xfinity internet service? I have the 1,200mbps plan and the XB8. I find it sometimes is erratic (or rather erractic compared to what I'm use to) is a jitter of 1.74ms good or should I be concerned? I play online games a lot and I just want to make sure its normal and NOT an issue. here's some tests I ran.