The judge is always a wild card, though, because you can suddenly lose the one you think you've got and end up with one you didn't anticipate.
I can't imagine any competent criminal defense attorney trying this to a judge, no matter the county. Judges are political animals, and you never know when one will recuse himself, or transfer the case to another. The Jury is what saves the day on criminal defense. You've got a decent shot at having 3 jurors who think well enough to buck the DA, if you make your case.
I'd be shocked if this got tried to a judge. Think of the ability of special interests to lean on one person.
Let's say one juror refused to vote guilty-- would that be a not guilty verdict? If not, how many not guilty votes would be needed? At what point does it become a hung jury?