The rules are actually silent on how much time is taken for the voting. It would not be a breach of the rules for us to take half an hour and have an opportunity to chat with the two candidates so as to make an informed decision.
I quite literally cannot make an informed decision about two candidates, neither of whom, to my knowledge, was a candidate before the moment they were nominated, and neither of whose qualifications, one over the other, are known to me. It would make a sham of any voting procedure if we were simply to be told we have to tick off a name on a ballot without knowing why we're doing it.