This doesn't come close to the actual market share you'll find in the likes of Gartner or others. The cloud landscape has long been AWS, Azure, and GCloud as a distant third.
Yes, and it amounts to a puff piece for GCloud. "We don't think we're as far behind as everyone else does" is not a compelling argument. Google is only too happy to believe Gartner rankings when it's in their favor [1].