This is a training thing that, as you are doing, I wound up learning from what Kroc is doing.
I would never have imagined that such high-rep work would be the way to go.
Yeah, I know, the reason he was doing it in the first place was because he didn't have access to DB's heavy enough to force, at his strength level, more moderate reps.
But he found that the high reps really WORKED for him.
I've seen benefit also by allowing reps to go as high as he is known for doing. Of course that requires for me lighter weight than he uses, but these things are all relative to one's own strength.
I would definitely suggest working as light as weights allowing 25-30 reps, and working up in weight each workout from there as reps gradually fall (but try to hold them as much as possible.) And then continue cycling the weight.
If you'd be doing it twice a week, one day might be substantially lighter and higher reps than the other.
The bench version can be done down to 6 or 10 reps also. The other version allows using even more weight for low reps and also hits the muscles a little differently (can't really say how, but the angle of pull certainly is different.)