They can change course faster but once the course is known you can get a long way by simply throwing more people at it. Big corps can do this, one man shows cannot.

I don't know about Google, but my experience working in big corporations gave me the impression that they're extremely slow-moving and tactical.

They may have more people to throw at things, but they will almost always prefer tactical over strategical, as all of the managerial chain is judged by quarterly profits.

Note how so much of large corporations' innovation is really just the purchase of small start-ups which can think strategically and focus on the right things.