In the context of how others scored I would say 17% is fairly decent as well. However, most Hacker Newsers make up a small percentage of a standard "UK consumer." I thought this number was incredibly low given that most people's interaction with Google would be as the organisation with the stated intent "to organise the world's data" - not as a corporation that makes money from advertising.
With that said, Google & Starbucks have been front and center in the mainstream news a lot lately in the UK with regards to "tax avoidance" claims.