Traffic has been increasing for years, so a multi-year "working on it" effort is probably a good thing - it shows an ongoing effort to size the resources to the level needed at the time, and adjusting as times change.
Is that a reason to believe it less? You can also see from hiring threads that it's a very small (but growing) team and that inherently it is truly being worked on.
Hence, I would conclude that he is working on it for years.