Even putting that aside, I'm not sure how them changing from one rank scoring system to another on their own search engine is them playing "God" for the web. The whole goal of Search is to rank items per some metric of "quality", and speed seems as good and fair as any to me.
No matter what I search for, I'm not going to be pleased to have the results listed in order of page load speed. The goal of search is to rank items according to a metric that matches what the searcher is looking for, not a metric that reflects the search engine's internal preferences.
For any competitive search engine, its internal preferences are expected to be a reflection of its users' preferences and not a whim as you seem to be implying