I cant get more than 150 mbps wireless on the Asus N 12 router.
I have a N USB donger rated for 300 mbps and my laptop and it cant get past 150 mbps.
This is my stat from Tomato below under the 'Overview' tab:
Security WPA2 Personal (PSK) + AES
Channel 5 - 2.432 GHz
Channel Width 20 MHz
Interference Level Acceptable
Rate 144 Mbps
But I did set it up for Width of 40 Mhz!