I take it a step further than that.
I will go so far as to assert that not only have the above millions of adherents over thousands of years failed to produce any convincing evidence, but also that a resonable counter-theory can be advanced to explain the APPARENT existence of god (or at least, perception of the existence of god).
To whit: that religion is a form, a mechanism, of social dominance and redistribution. This, to my mind, is a superior explanation of the observed "religion" phenomenon than speculation as to the existence of God or otherwise.
Therefore, I'm quite hard on agnostics; I claim that they want to have their cake and eat it too. Due to the weakness of the evidence advanced by theists, I am not convinced that the very question of the existence of god is one we have a duty to explore, even for our own satisfaction. All we really need to explain is the occurrence of CLAIMS of the existence of god. Thus to me the agnostic is allowing their skepticism to prevent a commitment to one theistic position, but not allowing their skepticism to propose and alternative answer to the problem. The agnostic is thus to me a "crypto-theist" or something to that effect.