The person who wrote this article does not know what they are talking about. The Rorschach is FAR from getting more popular everyday, it is much more rarely used and there are empirical articles that show it's great decline in use. It is not primarily used to 'diagnose mental retardations;' that is absolutely false. They do have standardized meanings, regardless if whether the research supports these meanings, so that is also false.
Even the Rorschach's strongest critics do not say the test is invalid.