In this article; http://www.T-Nation.com/training/excelling-at-the-big-lifts
the author advises the reader that "keeping the shoulders together and down when setting up" for the deadlift is the best approach.
However, in this article; http://www.T-Nation.com/training/the-dead-zone
the author says this is one of the biggest mistakes you can make when deadlifting.
So, which is it? Why?
I have always pulled my shoulder blades back when deadlifting, but recently I tried this "rounded upper back, arched lower back" technique with some light weight and my first impressions were very positive.