I agree. The first time I pulled 500+ weighing around 170lbs at that time I was doing a Stu McRobert Brawn style program and I was squatting followed by SLDL's for 1 set only once per week. I had some cousins come in from Ohio and we started messing around with the weights and that night I hit a 485lbs squat, 340lbs bench(T-n-G) and pulled 510lbs.
This definitely stands for me. Seems like the more I deadlift the worse I get at it. Don't know if its mental or that the lift just drains my nerves. Strange enough, I also found this with the Olympic lifts. One per week of both lifts was the best for me.
On the 2xBW note...how many here have managed it double over hand grip no hook? I pulled 370lbs easily just a few weeks ago and tried 380lbs and it slipped out of my hands 3 times. I want that lift! Actually I want 400lbs+ double over hand no hook, but that may take a minute or two.