I have two Windows 7 machines on the same wireless LAN. When I try pinging from one machine to the other, the round trip times range from 1ms to 300ms, with lots of variation in between. Is it normal to see such high latencies and jitter?
I tried multiple brand routers as well as different WiFi channels, and the results are the same. If I switch the machines to wired, the problem goes away and it's always in the 1ms range.