It goes further than that, sometimes people can't even fell the difference between not right and right! Same guy, destroyed his TRX850 very slowly over 13 years....3 motor blow up's in that time, and when the bike gave up one last time, with a cracked and bent frame, seized rear shock, almost completely seized brake calipers, front and back, bent handlebars, broken rear sets....got on the same bike after I had completed a nuts and bolts resto that bought the bike back to better than new IMHO, with 16kgs less weight, 30% more horsepower than stock, with rebuilt suspension, better, more modern brakes, etc...and his first comment on returning from a ride on the bike was....feels just like it used to!!!!
I nearly fainted! How could it possibly feel like it used to????
Bloody hell, I can feel the difference between having 30ps in a tyre, and having 31ps in a tyre!
Some people just drift through life oblivious to what's happening around them I think!