I find my vac (royal) gets 90% of it, and a rotary with poly brush will dislodge the rest. You end up with it all balled up and scatter round the carpet, but normally extracts off OK. Using higher airflow than a standard twin-vac porty really makes a difference picking up hair and fluff, because the wetter it is the harder it is to pick up..
Cut pile Polyprop, especially when matted down and worn is the hardest carpet to get hair off