Fresh Meadows, NY
I ran into this last night at my fiance's house. I used Inssider to see all the channels being used and those broadcasting at high signal levels so that I could avoid it.
In my specific case, the least used channel was not the best by far. I told the router to use a specific channel and then set it to "automatic". This in turn did produce the best results.
I run speed tests and tested latency/packet loss on each channel as well to help with the findings.