In effect this argument is that smaller accounts will be more effective at discouraging pre-fifteen-minute votes (relative to total votes received) than large accounts. That seems unlikely to me since larger accounts are almost universally more sophisticated users.
I've been pondering a project to vote accounts with large expected payouts at minute zero to create this effect intentionally. I think once more people are paying attention to this issue the consensus will be that it's incredibly stupid that I will be able to do that. But we will see.