That is unusual, YP are good at blasting "sales call" levels at you in part of their sales pitch.
What they don't ever mention are the dozens and dozens of calls that are nothing to do with "sales" but are from charities, tele-sales, price shoppers, wrong numbers etc.
Any information they give should be taken with a pinch of salt.
I am not a big directory fan, and don't approve of the expensive add-ons that they sell such as 118247!
Nicky
Nicky