On the Apple site I am seeing the issue with the regular version of Safari. I haven't gone on recently with the mobile version. On my site, Mobile Safari used to display the site correctly when no zooming was being done. I probably have to look at it again as I haven't done so with the latest iOS update. I may also need to adjust the default Safari page width which tells the browser how many pixels nominally make up the width of the un-zoomed page. That's what it bases its scaling off of I believe.