for a lot of people, they use the pump as an indicator that they've "done enough", so while itself a pump doesn't indicate a "good workout", it COULD be seen as a "finish line".
that said, the muscles i feel the biggest pumps in never seemed to grow the best for me (calves, biceps), meanwhile i've never felt a trap pump, a hamstring pump, or a lower back pump and those are my best areas. additionally, i've grown the most in the chest and triceps training chiefly in a lower rep area and... no pump to be had there.
so my gut says "no", but that's hardly definitive.