Good advice, for which I would generally agree. I kept the volume somewhat high on the warm-ups, though, so that I would not feel like I was taking it too easy by dropping out some of the lower weight warm-ups. For example, I used to do 135's and 275's in a warm-up ramp, but found I was using up my energy on that. So, it's a trade-off. Oh, and I use 5 reps so I don't have to think about how many I have to do for this set - LOL!
But, you are right, and I can envision that my 1RM test next week will involve ramping the warm-ups down on the lines you've suggested. Thanks!