Given the frequency response from DC to > 100kHz it looks like the pot is DC coupled and thereby running the risk of a scratchy pot.
It would also depend on the used opamp.
Opamp with FET input has lower bias current and thus lower scratch noise as opposed to transistor input.
Then again the addition of a simple resistor between the wiper and gain opamp can also lower noise. Lets hope they figured that out yet. Penalty is a bit higher noise level.
When the source has a little DC on it there will always be some 'scratch' noise when adjusting.
With listening tests it may well be detected (with sensitive headphones).