Is the teambuilder a separate queue?

The Teambuilder recently got introduced to the live servers of League of Legends. I really like the idea and all but there is one thing that interests me:

Is it a separate queue? Do you get matched only against players that also use the teambuilder or can you play against players that queued up in blind pick?

Hey according to the forum post the queue is a seperate one:

2) Will Team Builder replace other queues? a) Initially, Team Builder will be an entirely separate queue. We're looking forward to feedback from players and will use that feedback to determine whether this type of Champion Select is a good fit for modes like Ranked Mode but for now, we're focused on improving the Champion Select experience as an independent queue experiment.