I have flown with 3000hr airline pilots, military pilots, and all other types. And some of them have scared me more than anyone else I've trained flown. They usually get to slow and flare to high on short final. And suprisingly they forget to do the checklist because they are used to having a FO doing it with them. Some of them have really great single pilot skills while others....not so much.
But I have to admit that none of them looked down on me as the "little CFI Guy" or lowtimer. They were all open to my suggestions, critiques, and, demonstrations. All of them have been class acts so far.
(how did I know that would be the response from a young CFI)
You might consider me young (24), but I've been building some pretty good experience and have faced some pretty tough challenges....i.e. dealing with mostly foreign students, language barriers, and busy airspace. But I've been flying for almost six years and instructing for almost a year and I have to say that I have learned most as a CFI in the (almost) one year than I've learned in the previous five years hands down. Until you've done, you won't understand. And hopefully I will be moving to 135 shortly and will be saying thing about that experience in a year from now.