They say 4x8, but the first 3 sets of the 4x8 are with weight you can do like 20,15 and 10 times. So it's like 1x8 but with a good progression before it. It's not 4x8 with your top weight. That's pretty much what I do all the time but I don't call it 4x8 or 5x8 or 8x8. 8x8 is a little exaggerated but it would be for example the first 7 sets with increasing weight you could do let's say 20,18,15,13,11,10,9 times (or whatever) if you were going all out.
You have to be cautious what those guys write in their program. I really don't think those 50's or 60's guys did 70 sets or whatever it is of their top weight like it is said in the recent article. They just did alot of sets in their progression. How much set they really did with a maximal reps for a heavy weight we don't know and frankly I don't care.