Of course not and I do not really expect any single patch to make that kind of an impact. Yet, I think it is only fair to give credit where credit is due. I see development heading the right way, dealing with some of the awful 2.2 changes and making the game playable (and compatible to modern systems) once again.
For a greater change in population, things like good project governance, solid funding, communication and plain old advertising are equally important. I do not see the project (as a whole, not just the game) as being ready for a large scale influx of old and new players, but I am always happy to be proven wrong.