Forum Moderators: open
If I'm all that interested in the cache of any particular site, at any point in time, I'll meander over to the Wayback Machine and dig around.
There is a purpose to my searches and if that site comes up in the results w/o a cached link, I'll at least look the site over. After all, that is why I search.
I use cache to immediately find my keywords. I want to be able to tell if the site is relevant or seo'd right away.
But that being said, I have yet to meet a client who understood what the cache was, so it's definitely a minority that use it.
I beg 95% of users doesn't notice such little small things.
I'd say that number was probably around 99%. ;)
It means nothing to the casual surfer. It does mean something to a savvy webmaster or marketeer. There could be any number of reasons why no-cache is utilized on a page/site. It should not effect CTR in any noticeable way.