I have 2 520gu, 1 modded with teddy bear and 1 with stock tomato. For my testing I left everything default (fresh flash, nvram cleared). For testing sakes I even flashed the TB modded one to stock and other one to TB mod, which yielded the same results. Can't really go on this test (speedtest.net) alone but when testing both routers the stock firmware wireless speed was almost 7 - 10Mbits faster. The wireless speed test matched pretty close to my hard wire speed test; give or take a few. I recently got a RT-N16 but experience the same problem. My stock 520gu Tomato firmware wireless is faster than the RT-N16. In short, my Teddy Bear mod gets 14-17Mbit while stock gets close to 24Mbit. Is there a setting I am not aware about that is on by default?