im not doing anything less then a triple, and i'm controlling my volume on my real heavy sets. Only doing a few sets of 3-5 then a couple back off sets, then my accessories.
i agree the deadlift is not like the bench and squat where you need to feel that weight on your hands or on your back. Deadlift you can get away and actually make better progress doing "higher" reps and staying away from heavy singles.