Does Google+ Really Have 60% Daily Engagement? Probably Not

With¬†90 million users, it would seem that things are going quite well for Google+. Those numbers don’t mean much without context, though. Google+’s Vic Gundotra seemingly¬†providedsome of that context by posting an image that said “over 60% sign in daily” and “over 80% sign in weekly,” but it looks like Google is being rather vague about whether this means that 60% and 80% of Google+’s total users sign into Google+ or if they sign into Google (or if it means something completely different instead).