Evolution is completely compatible with God, so evolution isn't a good counterargument to God. That's the main point. The specifics don't really matter.
And WTF you guys. I'd really appreciate it if people didn't hijack the thread with the actual arguments/evidences for theism or atheism.
This thread is about atheism and if the atheist stance is making a claim that needs to be backed up. I'm completely convinced it does and I haven't heard a good reason why not.
And by the way, in this thread we are treating atheism as "the negation of theism, the denial of the existence of God", as defined by the Stanford Encyclopedia of Philosophy. If you want to treat atheism as some sort of neutral, claimless, 'born-this-way' belief then feel free to slap that definition onto an already-defined word, but don't be shocked if people refuse to argue with you about semantics.