It is, but discounting PHP because of WordPress from that graph is still interesting - I doubt there are free one-click installs for ASP.Net like there are for WordPress for example, but are there for Ruby on Rails?
The comparison does not make sense. WordPress is a CMS that happens to be written in PHP, while ASP.NET and Ruby on Rails are frameworks for building web services which don't do anything by themselves. At best you would get a blank "Hello world" page and nothing more from a "one-click" installer.