Ironraider, I see what you are saying, and I agree that our definition of high/low volume differs, and mine is right and yours is wrong
Volume is just total tonnage. So, weight moved x many times
100lbs x 10reps = 1000lbs of tonnage
300lbs x 3 reps = 900lbs of tonnage
Obviously, as volume goes up intensity and weight MUST come down. You simply cannot lift 80% of your 1RM to failure or very close for 12 sets. You just can't. So, as the volume goes up, and the weight and intensity drops, so will the tonnage.
So, lifter a does this for chest day
warm up
Incline Bench 215x 8 for 3 sets 5160
DB Bench 90s x 12 for 3 sets 3240
Chest fly 120lb x 8 for 4 sets. 3840
Total tonnage = 12,240
Now, take a DC guy
We'll just use dusty hanshaws last chest exercise he posted on IM for this
smythe incline 415x9x4x2 = 6225 tonnage (not going to try to formulate relative tonnage of statics lol). Now, if we add the tonnage from other compound movements for triceps the number goes up again. NOW, if we add to that the fact that the DC has a frequency of hitting a bodypart around 2x every 8 days, the tonnage doubles. 6225x2 = 12,450.
I'm sure some of my math may be off, I'm more of a literature kind of guy, but you get my jest. Basically, the volume (tonnage) is roughly the same. Even if we don't use a guy who does 10 sets once a week, we can still see that overall that the volume isn't what I would call low.