Most people say "google" to mean alphabet.
That being said, I'm perfectly happy to just be proud of what DeepMind has achieved. They've been great to interact with when there were shared challenges, and I - and to my knowledge all colleagues around me - aren't very interested in a question of credit assignment.
Google's infrastructure and DeepMind's internal (not cloud) access to it has been absolutely critical. In many ways, DM is leading Google in terms of software development, while Google is leading in providing unique ML hardware capabilities.