[richbhanover]

@LinuxBender is on the right track. Bufferbloat can cause this kind of lag. (There may be other causes, but first thing to do is check for bufferbloat.) To do this use:

http://dslreports.com/speedtest

This measures the latency/lag while data is being transferred. When it's complete, click "Results + Share" and you'll see a report. Send us the link of that page so we can see your results.