Sure, that is true, but this does not prove that right and wrong are wholly subjective concepts. It could just as easily be said that right and wrong are objective areas of reality that we subjectively percieve and discover.
Hangdawg,
It seems to me we need to consider context. Right and wrong are meaningful only in context that is to say in relationship.
I think your theistic basis of morality makes your concept of God the context in which you determine the good and bad, right or wrong of a particular action.
I'd ask you to consider that a non theist, even atheist would also have a highest concept that gives a context to their morality. The context I find most repugnant would be men like Hitler, Stalin, Ted Bundy, Rev. Jim Jones, or David Koresh whose personal needs and animosities are the highest context of their morality. I do not accept that their morality is the logical conclusion of atheism.
I am thinking along the lines of the Buddhist concept of Dharma as impersonal, universal, and observable "law" vs. the Abramamic relgion's concept of revealed law of a personal nature.
lfen