A good amount of the average popular site is navigated by drunk people, therefor in this case...a live test by a real drunk driver can be very telling in terms of navigational experience.
Hmm for the test to be really valid it should be performed by a non web professional/developer, for the most users are not tech savvy. Take the average Joe, owner of a powerful, performant device just because it sounds good, while having no clue how to use it, let alone copy and paste a text.
That would be relevant. And way cheaper And healthier, you don't even need the tester to be drunk