I'm also just now seeing some really solid jumps in the rankings. I have NOT pruned, cause I only have like 60+ posts anyway, but I've done a lot of EAT stuff. On site, off site.
I just saw particular ranking success on "cheap widget", which is a product feed page combining 10+ feeds with 500+ products. I'm the only one to do so. Only 300-400 word content. Search intent reigns supreme. Cheap = user wants a selection of choices ranked on price. Could Google really be as smart as to recognize a product comparison search engine?