The question is: who is in the best position to attract the attention of the prospective users quickly and effectively? I'm willing to bet bravura at this poin

The question is: who is in the best position to attract the attention of the prospective users quickly and effectively? I'm willing to bet bravura at this point. Simply because he has the traction way way before the Stackexchange versions launch plus he has all the communities together. All it needs is a little momentum and Area 51 sites will struggle to catch it.