The above arguments are exactly the reason why I don't think the votes will bring anything close to a result. While some might think that a mod is fair in his moderation if he is somewhat lenient, others might feel that another mod deserves to be a global mod due to his activity(I belong to the latter, although there is no exact data on a mod's moderation) and others might want someone promoted for (close to)no reason at all. If anything perhaps the votes of members that theymos finds trustworthy, would somewhat influence his decision.

Lastly, I do not see a reason for another Global mod. AFAIK the last promotion happened as other Glob. mods were not as active and Cyrus already had some experience in moderating multiple boards.