We're about to hit 100 pages of yes you can and no you can't. Why is it so important to 'prove' anything? Measurements don't prove what you can hear. They are a tool derived from listening to help in design. Cart before the horse if you use it as proof as they are not all encompassing.
Try for yourself on something that is good enough to matter (Generally not computers or portable) and judge for yourself. If you don't hear it or care, great! If you do, also great but no one should tell another what he or she can perceive.
I'm of the (repeatable) opinion that much of this is quite audible but I really don't care if it's important to anyone else. I do care that folks are told to close their minds due to a few zealots that think they know everything.