No. Your metrics are deceiving you, because your test suite under-weights or fails to include sophisticated searchers and programmers, and fails to include highly-specific queries with only a few results. For technical people, Google search has gotten so much worse it's hard to ignore.
Google fails for more than half of programming-related queries, because it splits up multi-word identifiers, and spelling-corrects valid technical terms to unrelated English words. It fails when searching for uncommon error messages in quotes.
This might be tolerable if turning on Verbatim mode was easy, but to do it (without a browser plugin) you have to first do a failed search, then click three times, the second of which is hard to aim because the target is animated by the first click.
Google Search fails whenever I'm doing a search where I suspect there are few or no results and want to confirm that. Then there are the queries with one or two matches on StackOverflow or a mailing list that fails to answer the question. You can't just move on, because there are pages and pages of scraper sites cluttering up the results with the exact same message. Improving the ranking doesn't help, because the problem isn't the rankings, it's that you don't know when you're done.
Then there's personalization, and in particular the inter-query persistence. You do this because some people make two queries, and include keywords that accurately indicate what they want in the first query, then omit them from the second query. In my own usage, however, if I do a second query it's often because the first query had something in it that I didn't want, which spoiled the results. Since I always include the keywords that were actually helpful, I get none of the upside. And if my second search then gives bad results, personalization means I can't trust that the reason is part of the query I made.
Basically, you've improved your metrics at the expense of everything on those metrics' blind spots. There are a lot of people whining, most of them unable to articulate what's wrong, but they are right. Now please, go enter these complaints into your bug tracker and fix it.