That is nice observation, faith is actually animating force behind all action. The quality of that faith depends on understanding reality. For example : atheist and theist have completly different faith so we can expect different experience. So quality of experience shows amount of understanding. But unfortunetly quality of experience cannot be measured(only to some degree and limited time). Only oneself can decide. That is meaning off :to be honest with ourselves.
Agree.
I'm not sure I understand this last part... what do you mean?
That experience is subjective. So you cannot "prove" that you are more realized then someone else. But you know that you are more happy with particular set of beliefs then with another and that points you to proper direction. So this faith is objective even if it subjective. This is contradictory to logic becouse its beyond. So faith is like thinking in 4th dimension.