I've always believed that our worship styles are founded more on cultural norms than Biblical guidelines. (When I refer to our "style," I don't mean who we worship or for what purpose, but the overall format of the service.) Especially since the Bible only gives us a general outline for a worship gathering.
In light of that, here's an interesting article of quotes about worship from some of our founding fathers.
Craig Groeschel is right--today's contemporary is tomorrow's traditional.