I have recently been experimenting with 'grip and rip'. I am a very slow puller off the ground and after I move it a few inches, I accelerate towards lockout. I have found part of my issue may be related to my setup. (stuck at 635 @ 205lbs bw) I spend too much time "down" setting up getting ready to pull. What I notice, is that setting my breath in the bent over position, I cant get a big enough breath to effectively push against.
I have seen many of the top guys hold their arms out and stand erect while in front of the bar. The take a huge breath, then bend down and just pull on that single breath. I am now trying to integrate this technique to my form. I am using a light weight of something I can rep 15-20reps if I just do a straight set. With 405, I stand at the bar and set up as I described. I take the breath, bend down and just rip it up. I set it down and re-do the whole setup. (You get pretty winded holding your breath this much and I only get 10 reps or so before I am gassed doing it like this.
I have yet to try to carry up the weight and see how this will work with heavier weights, but I believe it will be significant off the ground with the extra inter-abdominal pressure I am able to generate. I am fairly lean and I can only tighten a belt so much. Generating pressure to push against can be a little tough.
I agree with deficits but also consider the setup....