Yes, though I feel like noncompetes were pretty standard for several years after that. Certainly in the years leading up to it they were; not only were noncompetes normal, but so too were IP contracts that assigned any side-project work you did in your off hours to your employer.
All I'm saying is that you get well past the Google IPO before it becomes broadly accepted that noncompetes are invalid in California, which certainly rebuts the idea that Silicon Valley succeeded due to a lack of noncompetes. (Noncompetes are mostly very bad.)