Since late 2013, I have noted an increasing number of websites that no longer support pinch - zoom. These are full sites, not mobile versions. They fail to respond to the Request Desktop Version option in iOS 8.1 Safari.
These include but are not limited to
The New York Times
The Washington Post
The Post and Courier (my local paper)
Please note that the lack of support shows up in articles, but may be present on the home pages.
This problem is caused by using a "responsive" template for the pages; this can be avoided, which I do when doing Wordpress sites.
Although there are workarounds, this is an easy to fix issue that denies low-visioned users full-functionality. Apple is aware of the problem.