No idea about manual, probably not many as there are a million small accounts that use autos all over the place for years. But, when it has come to the whale support, a lot of that has been manual. I don't count number of votes as that important, it was just about the blocks in this case. When it comes to the larger accounts, they generally only autovotes where they find some value first. Autovoters still need to be set manually.
More important for me as a metric is the engagement level.
Small accounts simply follow the big account trail hoping to get some curation....the most important drawback of these auto votes is that even if you publish a null post or shit, it get rewarded. (you must try it once)
Luckily not in your case, as you are a genuine contributor, who always bring some interesting and meaningful content on Hive. Now with upcoming hf25 I hope people get enough time to curate and thus focus shall shift on manual curation.
I have screwed up a post once. I spent the next 3 hours writing a post in its place to make sure the votes weren't on nothing. Back then, I was earning far less than today.
I think it will make a difference.