My thoughts are that most of us are not on such a madreiga. You can probably find stories of various gedolim who exhibit this extent of anava and it is possible for them to do so because those who would mistreat a godol are certainly in the extreme minority of people he sees. However, we can still learn some direction from this as in which direction to work towards.
In a perfect world, this midda would be possible for everyone because no one would intentionally mistreat another person and the only test of this midda would be if one mistakely mistreats someone.
I remember reading that R’ Elya Lopian zt”l once said that he was afraid about his middos because his status made all those around him treat him properly all the time. He had a resolution to this, but I don’t remember it. This is quoted in one of the English language gedolim books (most probably the R’ Elya book 😉