I'm back to WoW after an 8-month hiatus and found out that now we have to set up Battle.net accounts.

I've read some posts but do not have a definitive answer to my question: one Battle.net for all or multiple Battle.nets with 1 game per?

The posts I read are a month or two old so I'm wondering if there is any new development. Is there a general consensus what the best approach is? I seem to gather that the single account approach would require 2.5 mins to login? What are the pro's for single account then? And cons for having multiple battle.net accounts?

Thanks dudes.