My friend forgot their umbrella at the office.
They nervously answered the phone.
They're a lazy motherfucker.
I gave my friend a hug and wished them a speedy recovery.
Any of those sound unusual, or like they're referring to more than one person?
My gut says that most of the people who vote early have already had their minds made up for a long time and not much would change their vote one way or the other, otherwise they'd probably wait until the day of to see what new information might come to light in case it changes their mind.
And in general Democrats vote early in higher numbers than Republicans. This wouldn't do much to change how the Democrats vote (what are they gonna do? Say "well I wasn't going to vote for they guy anyway, but now I'm really not gonna vote for him?") but you would at least hope it would for some Republicans (though that might be wishful thinking.) Since more of those Republicans are going to be voting in-person it may have made sense to hold this back so it was still fresh in their mind when they actually go to the polls.
Just my 2¢ on the matter. Take it for what it's worth.