Yep, Nielsen and TV people are now paying attention to Twitter postings on shows. It's how Sharknado got so much attention. It's regular viewing ratings weren't that much better for Syfy than any other movie/show. But Twitter blew up about it and made it a sensation.
Let's try this with Metalocalypse. If I remember the info about it correctly, they track from 3 hours before to 3 hours after a show. Which would be from 9 PM Eastern to 4 AM Eastern, plus 3 hours for the west coast and 3 more hours to Hawaii.
So, a few hints/suggestions:
1.) Use #Metalocalypse. Not sure if #Dethklok would be counted, but the Metalocalypse hashtag will be counted.
2.) East coasters, please try to keep spoilers out of your posts. Granted, 140 character limit helps a lot, but remember the West coasters.
3.) So, post early, post often. Not sure if reblogs count, but do it all!