Probably, and note that I'm talking here about the wedrifid account. At last count wedrifid had more comments than any other and also likely exposure and votes on more comments than most.

Isn't that irrelevant, since a vote-counting script would have to check every comment on the site regardless?

Would overnight be enough? How many bytes would it need to retrieve? (I'm considering the practicality of using a script/program to cancel an account's votes and recast them from another account; upvotes (also subscriptions) initially and downvotes once enough karma is earned.)