Comscore's words shows that Google+ grew from 65 million unique visitors in October to nearly 67 million in November. This is purely based on traffic to the plus.google.com subdomain. So it doesn't include the many Google+ feature injections that the search company has administered to its other properties over the last months. Some people have suggested that Google+ is as barren as a desert — this is at least an oasis. The following data will give you correct info.