I agree. Users who are dedicated to the platform as their raison d'etre can possibly do the whole early voting thing in 9 hours (and maybe that's a good incentive to be dedicated to it), but I consider 24 hours is reasonable. I often don't see new posts for 2-3 days at times, but if I know there is a more reasonable 24 hour window I might be inclined to look at the platform more to vote more and comment more earlier. Too small a window seems like a window designed for bots/auto-votes and not humans. Too larger window creates no incentive. It's certainly a balance.