Why do you keep on judging people in every post?There is virtually no such thing as a "real world" test. Way too many variables to control and the results usually come out as being statistically invalid. Have you ever worked in a testing environment where obtaining valid results is important?
That phrase is generally thrown around by individuals who don't know what it means, and do not understand what is involved in generating data that is valid. It sounds good to the uninformed but that's as far as it goes.
https://www.frantzfilters.com/science/