Yes there is boss I have worn lifts and observed the difference with my own eyes.
There is a minor difference but not enough as to say tht if you were 5.9 you wouldn't have had any problem with your height.
So if you have problem at 5.8 it is for sure that you would have problem at 5.9 too.
Tibike, yes there is a threshold that when you pass it you'll guit obsessing with height.
Imo this threshold for any sane person is 5.11 or even 5.10 for many people. Someone who is 5.11 and more and still obsess with height has for sure mental problems.
But anyone under these height, even though 5.8-9 is completely different to 5.5, has any right to not feel good with his height, at least on west.
It is not a placebo effect or anything else that tall men are get more attention and respect but something very obvious that we see everyday.
Only some people who know about heightism, like me, don't treat tall people in a different way to short ones, because there is really no reason to treat someone different for something that haven't chosen or worked for it.
But unfortunately most of people, even short ones, subconsciously behave better to taller men.