Heavy weights=Big muscles
Big Muscles(growth, hypertrophy) are the result of direct stimulus, right? Now, does your muscle know wether you're going heavy or not? Or, will medium weight for higher reps cycled with heavy(for the individual)weight for lower reps not produce same stimulus?
Some people talking of what worked for them, and how they got big and strong, but was that powerlifter big, or bber big? You know the diff, one has a blob of size, the other shape.