I was reading a sticky on the intensemuscle forums(DC forums) about deadlifting tips a while back and agreed with with the OP posted. The OP lifts some good weight, and stated that the closer the grip the is, the longer your arms are, therefore the less you have to actually pull up. Also by rolling the shoulders forward slightly and letting them hang loosely, rather than bringing them all the way back, also equates to a shorter pull distance. Ive done both to my deads and I went up immensely on my weight.
Also you can mess around with leg configuration( hands inside/outside knees, narrow/wide stance, and straight-slightly bent/ bent knees) to take out the ham activation and put more workload on the back.
The only con of this I noticed was a slight decrease in weight @ first, due to learning the form and getting in the "groove", but in no time I was repping 100 lbs more on my last set.