I have this with my router and I can get the advertised speeds, unliked b or g. So, im talking 130Mbps. My router has it set to auto, and as soon as it recognises the wifi card only supports b and g, it will automatically go back down to 54mbps, but its still awesome to see the possibility of 130Mbps. Who know's maybe we will see the theoretical speeds of 300Mbps.
Current Consumer net, is around 24Mbps, so even at 300Mbps, you wouldnt see much difference there, but with file transfers and using the net, wifi wont be as intermittant as it currently is.