He probably wonders why it's called "5x5" when there is "1x5" "3x3" "1x3" etc, and 5 sets of 5 is less than a fraction of the routine. It also doesn't explain how this is different than any other workout.
"5x5" is a stupid term. Forget it.
This is a "olympic workout". This is how the Russians worked out for the olympics. You basically bench, squat and deadlift constantly. It doesn't have anything to do with bodypart splits.
What makes a squat workout hard? Either doing 100 reps (high volume), or 800lbs (high weight).
If you bench, squat and deadlift all the time, you never have time to recover. Eventually you will get sick. This is called loading.
In this olympic routine, you work for one month with high volume. Right before you get sick, you take a week off. You dump the load right before you crack.
In the following month, you increase the weight to sickening levels, while keeping volume low. You should finish at new maxes right before you break.
So its volume ---> break ----> heavy weight ----> break
The volume phase is 5 sets of 5.
The heavy weight phase is 3 sets of 3.
There are many ways to take breaks.
If a routine says "1x5", that means you might do 5 sets of 5, but the weight pyramids up, so your 5 sets might be at weights like 135/155/185/205/225. This is not very hard, and is a way of doing an exercise when you don't want to put much into it.
Even though you might squat monday, wednesday and friday, only on monday do you do 5x5. On friday you do a 1x5 pyramid set. On fridays, you 5x5 bench is getting your attention (and the bench is 1x5 on monday when squats get your attention

).
Now if you keep the big picture and read the madcow routine it should be very clear.
If that doesn't make sense, then forget it, you're not going to get it.
Obviously, this routine is good for football or powerlifting. Is this good for bodybuilding? I think so. While everyone knows a guy who's very small who can bench 405lbs. But, if a man who can bench 225lbs takes his bench to 405lbs, he will be a larger, more muscular man by far. There is no doubt. There is no error. Bringing your bench, squat and deadlift up 200lbs is the simplest, clearest way to be more athletic and look fantastic. The shortest distance between two points is a straight line!