Like Amazon.com and AWS, Google.com doesn't share the same infrastructure as GCE. So while the employee experience and expertise may carry over, the infrastructure doesn't. EC2 had serious outages even though Amazon.com stayed up and running. And GCE only offers 3 data centers compared to the 13 that they have for their core. I'm not even sure the 3 they offer intersect with the 13.

It's a new line of business, and expect some serious rough patches. Google's brand will immediately step it up to a top-tier provider, but how they handle outages and deliver innovation will really dictate how well it plays out in the marketplace.