I'm loving the speed of the Air 2, especially coming from the iPad 3. Websites load much much faster, usually twice as fast or faster depending on the site. (Air 1 is my wife's)
Air 2 at top, iPad 3 bottom left, Air 1 bottom right
I'd love to figure out how to get faster speeds from my router. I'm connecting at 5GHz 802.11n, control channel 36 on an Asus RT-N66U and 80/30 fiber. I usually max at 40mbps down on the iPad A2.