Having been around guns since I was a kid, owned them since I was about 13, regularly shot them for many years, and having both sorts of devices within arm's reach of me now, I've never once been in a situation where the terms "clip" and "magazine" weren't freely used interchangeably, except for conversations where some pedantic gun control opponent wants to pretend that people who disagree with him don't know anything about guns.
I have never known anyone to give two shits about the distinction except in that context. I've never been to a range where someone passes a magazine to his shooting partner and asks him to "reload that clip" and everyone on the line stops to correct him. I've never heard anyone yelled at for saying they got a "new clip for my Sig" or anything of the sort.
Yeah, it's technically inaccurate to say "clip" instead of "magazine." Nobody gives this much of a crap except when trying to be dismissive. Ever.