Also, on my iPad, I find that many websites (news sites are the worst offenders) keep messing with my "tap to zoom on the main column of text" action. That is,

Also, on my iPad, I find that many websites (news sites are the worst offenders) keep messing with my "tap to zoom on the main column of text" action. That is, my zoom setting is reset several seconds after the main content is displayed. I have a hunch that it is, in a large part, due to ad networks loading long after the main content has loaded and forcing a reflow of the page.