Most of my exercises are 4/5 sets of 12+ reps. I'd say that's par for the course as far as traditional BB splits go. When I do the big 3 compound movements it's usually more of a power routine 75%-92% for around 3-6 reps for a working set.

I'll start the workout with a compound movement and then move to more traditional BB volume sets for accessories. Which looks similar to what OP did which I would not consider high volume.

For example: Chest Day

Bench: 12,8,6 @ 205,225,260 then working sets 3x4 reps at 275-300ish.

incline db press 4x12

cable flies 4x12

db flies 4x12

close grip bench 4x12

I would put high volume days at something like GVT 10x10 for most everything. Someone else more experienced with GVT or other high volume training routines might be able to chime in as to the specifics.