My experience is that Google search is best effort with a priority on latency. Lots of changes in quality, but never a significant delay in getting something ba

My experience is that Google search is best effort with a priority on latency. Lots of changes in quality, but never a significant delay in getting something back (internet infrastructure issues aside). So sometimes site: gets dropped on the floor for me and sometimes "no I really want this" does. These days everything in Google search is sharded, cached, and partitioned (remember when a page full of results in another language was not uncommon?). Good luck.