Does weighting of posts (only in hot?) take into account the amount of 'spent' upvotes vs the size of the overall subreddit?

I do notice that a the 'top' ranking seems to fail when I am subscribed to a number of small subreddits and a few bigger ones. The smaller subreddits then are drowned out by the bigger ones which is the exact opposite of what I want.

I also think grouping can be taken further (/r/a+b+c) as it is a great but lesser known feature.