This particular question/answer has been around for two years now:
It contains an answer that was accepted. However, the answer is not the correct answer. It's just plain wrong.
One of the more seasoned users posted this comment:
"This answer is still wrong. Google does not supply a WMS feed. Can either the author or a super-admin(?) update this? Its a very FAQ, and one that will appear in Google search results, and I dont want wrong answers being associated with gis.stackexchange."
Should there be a way to contest an accepted answer? Or at least bring it to the attention of a moderator or super-admin?