The war is between social networks and not their founders.
Mark Zuckerberg, founder of facebook has the highest number of fllowers on Google+ (The number of people who have added him into their circle) The number is more than 77,807.
Report from the Hindu here: http://www.thehindu.com/life-and-style/metroplus/article2200155.ece
Mark's profile here: https://plus.google.com/u/1/104560124403688998123/posts
For those who do not have access to Google + here is a screenshot:

Reason: update