Define far behind? Discord solves the low latency communication problem for me like 99.99% of the time without any sort of issue. I don't really see how you're claiming it falls far behind if the difference between it and Teamspeak/Mumble/Vent or whatever is so razor thin. I've barely noticed any issues in the past 3 years of Discord, and it was the same with the previous 4 years of Mumble and however many years of Vent and Xfire before that.