Contrary to what this article suggests you can indeed achieve 1GB+ connection speeds using this new wireless standard.
Some of you appear to be a bit confused about how fast this really is, yes it can be just as fast or faster than a 1GB wired connection but has some rather huge limitations such as going through walls or floors which the 2.4Ghz band can easily handle.
I'm one of the few running the Asus AC66U router with it's own version of PCI-e NIC the Asus PCE-AC66U, when using these together at a distance of 35 feet outdoors with minimal obstacles I usually run at 877.5mbps but have seen up to 1.1GB, it kind of floats around between the two because of the beam forming type antenna's.
The draw backs are that to achieve these types of speeds you have to be using the 5Ghz band which doesn't go through walls or floors worth a darn so it won't do you much good in a typical house setting with so many walls, in this case the 2.4Ghz band is still the better choice.
This new Asus AC66U router has the highest rated 2.4Ghz signal strength of any router on the market, in fact Tom's gave this new router it's highest rating and a special certificate of hardware excellence. It has Superior 2.4Ghz signal strength to my D-Link DIR-655 which is a very good router.
This new tech 802.11ac using the 5Ghz band is better suited to large office spaces without walls and will easily cover 5-10 thousand sq. feet, or any large outdoor area can be easily covered if the A/P is mounted outdoors like mine is.
Still this new tech won't come standard on any new tablet or laptop anytime soon so you would need to use a USB adaptor for 802.11ac.
And Alphanumeric, your one wireless G client is slowing down your entire wireless network by about 8 times. You can only achieve 54mbps with G, where N can be up too 450mbps with PCI or 300mbps USB, huge difference there. My printer was G only also so I just ran a cable to it.
And the Actiontek is only reverting back to the 20Mhz setting because most likely the 2.4Ghz band is crowded in your area, the DIR-655 holds it's 40Mhz setting regardless.
Here is something you don't see everyday....