Also keep in mind, the load you would use for a 8x3 would be different than you'd use for a 3x8 or 4x6 or 6x4.
The general consensus is the low reps per set at high loadouts (90% and above) induce neurological activation for strength development. Moderate reps set set at moderate loadouts (70-85%) tend to induce more hypertrophy.
Lower weights with higher reps are more metabolic blasters.
Cross reference what Waterbury says with Robertson's "Program Design 101."
TESTOSTERONE NATION - Program Design 101