Both my iphone 5s and ipad mini 2 are on 8.4.1 but they have different wifi download speeds on the same 5.0 ghz band. I do tests separately and the the 5s gets 50 mbps download and the mini 2 gets 130 mbps, I use speedtest app and they are both on the same server, both devices were restored at about the same time, I do nothing special with the 5s. Anyone else experiencing this?