Here is the wired Internet speed of my Buffalo N router. I don't see any problem here.
When I use my iphone or other wireless device to connect to my Buffalo 300Mbps N router, I got 1/10 of the speed, then it becomes better with the latest firmware, but still only 1/5 of the actual speed (see below result)
iphone4
D/L 2MB/s near the router, 1MB/s in another room.
My gf's laptop with 801.11b wireless card (average signal, but it says connected at 11Mbps)
D/L 200kB/s U/L 140kB/s
Is the speed normal or something wrong with the router?