Bought a new 13" MBP Retina yesterday, amazing machine, beautiful. However while troubleshooting an unrelated network problem, I noticed that when I run the network utility and ping my router (Apple Airport Extreme - previous Generation) I have huge lag spikes when pinging it. It may go under 1 ms for one ping, then skyrocket to 200ms on the next, then go to 80, 30, etc, back and forth. However if I use the network while running the ping test, they seem to normalize at <3ms. I ran a speedtest and got my full throughput (118 megabit down, 30 megabit up - Optimum Ultra) Is this normal? My Late 2011 iMac doesn't do this on wifi, it gets <1ms pings to the router. I read up on this and found some old threads from a year ago where people mentioned it may have to do with apple drivers and turning off the network card rapidly to save power, thus causing latency on these tests but not affecting "real-world" performance. Is this true? Anyone else with a new MBP have the same issue? I don't want to have to trek all the way back to the Apple store for a diagnosis if this is normal.