Darn your iPad Air 2 has got a quicker wireless card than my 2012 15" MacBook Pro.
I believe my laptop only has 802.11n which supports theoretical max of 350Mb/s? Even worse, the default router (Hyperoptic) that came with my 1Gb/s broadband ironically only supports wireless speeds up to 70/70 and no 5GHz -- though I was thinking of replacing that with an ASUS RT-N66U, as that supports 900Mb/s wirelessly; plus I don't think I'll get any devices soon that will hit anywhere close to those sorts of speeds anyway.