Please please please fix "sort by date" filter. Searching for "natural language processing" returns 3,330,000 results with the default "sort by relevance" and 4,730 with "sort by date."
The result counts are usually highly inflated and approximate anyway (i.e. can you eventually actually get all 3M+ results?), so perhaps they don't mean all that much.
The best explanation for that anomaly, which is more of an excuse, is that they don't want to spend computing power sorting all the results.
Nevermind the fact that sorting by date is probably much easier than computing "relevance" and sorting by that...