One vector of "unreliability" the article talked about was iPhones "failing to connect to WiFi".
Let's just put aside the problem with equating network reliability with hardware reliability... there's a big difference in HOW both devices connect to WiFi, by design.
Apple in the last year or so changed iOS so that it will prefer to stay on a cell connection if it seems like the WiFi is going to be flaky or unreliable.
So the "WiFi failing to connect" is a result of the software making the network connection (you know, the whole reason why you are trying to connect to the WiFi in the first place?) MORE reliable for the user, not less... we all know by now sometimes the cell network is vastly better than a sketchy WiFi node.