Yeah, that's what articles say but I don't know enough of the science behind it, but eh, whatever. As I mention elsewhere I don't get high-speed anything where I live so I don't actually have to care. ;)

Not sure it's even your mistake. AT&T and probably others have been pushing the idea that HSDPA+ is "4G" for a while. My iPhone 4S, which doesn't do LTE, shows a little "4G" indicator.