Well I've linked to this sort of research many times. Feel free to scrutinize it all you want, but I personally doubt you have the expertise to do so. This isn't a slam on you, just a statement of fact.
I'm definitely not an expert on research or research methodology, but it's usually pretty easy to spot glaring issues with subjective research. Such problems are much more rare when it comes to more objective scientific topics and are generally only identified by experts in the field.