Gizmodo did a side-by-side comparison of Google’s new Voice Search app on iPhone and Siri. Google wins every single time.
I’ve been using Google a bit on my iPhone 5 over the last 24 hours or so and it is blazingly fast. Siri, obviously, is far more integrated into iOS and can open applications, set appointments, etc. but strictly for getting at information Google’s new app is nearly instant.
As Gruber said, Apple now has something to shoot for. Siri’s abilities are great but her performance is relatively abysmal.