Corporate Download passes the test. Its not a business treatise. Instead, this is a tiger of different stripe. Shadowfiles was thin on information specifically about the megas. Instead, Download is almost completely about the megacorps.
Extensive information including names, places, and dates is really helpful to the gamemaster.
However, this is not a book for the easily bored or most players. In fact, I've gone so far as telling my players not to buy the book. Its much easier to preserve suspense and surprise if you keep your players in the dark. If you're looking for info on guns and gear, this ain't it. It does provide a lot of color for the game world which will enable the gamemaster to round out his game world in the Third Edition era.