Hair as part of your sensory apparatus is well – established, but it’s body hair. Short hair is more prone to be easily disturbed. Head hair isn’t even wired in the same way – tug an arm hair, then a head hair. The sensitivity and localization is much less on the scalp than the arm.
And try looking around that site – it’s just random anonymous uploaders, no reason to expect any kind of reliability.
Not to mention the first sentence, which screams crackpot theory…