Chrome may or may not be the best browser. But Google properties tying into Chrome as a platform (think sync, extensions, auth, captchas) and making it really difficult to switch away creates a situation where it's not all about choosing the best browser any more. This harkens back to the same anti-competitive monopolistic behavior that Microsoft got sued for in the late 90's.
The best browser isn't the fastest. It's the one you can trust to serve you and not some corporation or government that wants to control what you see and where you go.
