Does the average number of GAs that have been given to the answers on a particular question affect your perception of what a GA is "worth" in the context of that question?
If I see that everyone on a question has GA’s except for one lone person, I will give that one person a GA if their answer is good and not a dickish answer. Other than that, if I think someone has given a GA, no matter who they are, even if I have butted heads with them, I give them a GA.