Same boat as you bit I have a faster connection and I'm direct connected to ethernet. At 300/300 nothing in this forum has fixed my problem, and my jitter is 3ms and my packet loss is 0%. Latency is great but god does it look like a blocky mess if it gets slightly busy in game.
Ya, I currently have an unplayable experience. Ungodly input lag (probably close to .25/.5 seconds. This is the most headache-inducing thing I've experienced in gaming so far.
Connection: 1 Gbps down // 50+ Mbps up
I live in Alaska. If the latency was going to be a problem, they should have prevented me from even ordering the system in the first place.