also... a lot of people should remember that YOU CANNOT USE EXTREMELY HEAVY WEIGHTS WHILE TRAINING HIGH VOLUME UNLESS YOU ARE GENETICALLY STRONG BY BIRTH!!!!
there was a time where i could incline bench 3 plates and a quarter each side for 10 reps when i was training low volume... training high volume, i sometimes fail with 95 lbs on incline bench on the 10th rep.
there are a lot of people who will never admit how weak they are while training high volume... you can't expect to use the same amount of weight. not even close. if you are, you are either resting too much between sets, or you don't know what high volume is.
again, i do not believe strength is an indicator of anything... unless you use the word "strength" loosely... as in "if i do 10 sets of 10 while resting for 45 seconds between sets, and then 2 weeks later i'm doing 10 sets of 10 while resting 35 seconds between sets... so i got stronger"...
read up on gironda's 10x10, 8x8, and 6x6 methods, and read up on serge nobret's training methods. those are pretty high volume (although there are many interpretations of gironda's systems and they aren't as simple as you might think... i would put the 10x10 system with multiple exercises per muscle group in the high volume category... other interpretations, not so much)
those are high volume... 12 SETS FOR CHEST, AND 6 SETS FOR DELTS IS NOT HIGH VOLUME!!!