I tend to agree that someone like Scoble does not form the best basis to cast judgement on how engaged G+ is (even though he proves that G+ is not a ghost town)

I tend to agree that someone like Scoble does not form the best basis to cast judgement on how engaged G+ is (even though he proves that G+ is not a ghost town). Apart from his other talents and selling points, he has also benefited from his being an early adopter of the platform. As such I'd say a large number of his followers don't hang on to every word or comment he may make. On the other hand look at the stats of true tech luminaries like Linus Torvalds: thousands of likes, hundreds of reshares and comments per post. Torvalds is the kind of guy - with nothing technologically left to prove - that the G+ community enjoys following very closely. There is no way your G+ stream can be a ghost town if you follow people like Torvalds and far lesser luminaries (but greatly accomplished folks) on G+.