I’ve done it twice, once from 275 to 340 and from 385ish to 425. I was around 165 lb for the first run and 175ish for the second.
The 275 wasn’t that smart but I wanted 3 plates like immediately. My grip and legs got absolutely brutalized and there were times where I could barely hold a bar from the callus pain. This pretty much eliminated any kind of gap in my grip strength- I did most of the work double overhand and today I can pull about 95% of my max with it. My progress was great (was only shooting for 325) but at the same time I think I could have made a similar increase with another linear program like 5x5 that had me deadlifting heavy and consistently.
About 6 months later I decided to do it from a max of around 365-385 to 425. I reaggravated an old back injury over that summer and decided to get back into pulling with a vengeance. This time around the program was definitely harder, especially weeks 3 and 4 (the highest of the high volume) but I made it through and got my goal of 425 but 435 wouldn’t budge from the floor unfortunately.
I had some problems going between different gyms- my main weakness is off the floor and at my college gym (where I do most of my training) we have bumper plates that are about the size of competition plates (so I’m told) but are bigger by a good 3-4 inches compared to my gym back home. This was over Thanksgiving and another break, so some weeks I’d be pulling in one gym and the other in the next- definitely made a difference in difficulty and some weeks I didn’t make reps.
If I’ve learned one thing, it’s that the assistance work isn’t crucial to the program. I also subbed chinups for pulldowns and did pretty much whatever type of row I felt was appropriate that day.
If you’re feeling especially good that day, by all means do what you want. If you’re feeling drained than do what you can and get out of there and eat some food. There’s definitely weeks (4-8 or so) where you feel beat the fuck up and like you can’t continue but that’s overreaching for you. Oh, and don’t ever try this while cutting. A couple of my training partners did it on the Anabolic Diet and it wasn’t pretty.
Damn that was an essay. Anyways, good luck with the program.
Edit: Oh yea, and past week 1 until week 6 or so the speed deadlifts will not be anything close to ‘speedlike’. They will be slow, grinding rep work towards the end of 8 sets. Just push through it.