This may sound weird but does anyone know of issues with asus routers and Apple devices connecting to the wireless? I have a rt-n66u which in general has been a great device. It has the newest firmware on it which is rock solid. The router acts as a dhcp server. The dns is set to opendns and I have a dynamic ip. It broadcasts on both 2.4 and 5ghz bands using channels that are not being used by any of my neighbors.
I have comcast 25/5 performance package as my isp. My mid-2011 mac mini is hardwired into the router and works just fine. It consistently gets normal dl/ul speeds.
My roku 2 has no issues connecting on the 2.4ghz and has no streaming issues. But when I connect my early 2013 macbook pro to either 2.4 or 5.0ghz it is extremely slow doing anything, even doing a simple google search is slow.
There are times on my ipad air/iphone 5s that I get speedtest results of 5 dl/ 2ul in the middle of the day.