Mee too - it's the only way to do it unless you wanna risk slicing your hand to pieces (while also risking cutting the insulation on the conductors).
Apparently they're taught that pulling the cpc can cause a break somewhere further down the cable! What poo that is! OK, so there's the potential to weaken the cpc but only at the point whre it was ulled. Besides, once installation is complete, testing should identify any broken cpc faults anyway.
It's like the whole twisting cpc's thing. Personally I don't. Not because it could break the cpc but simply because I can't be bothered so while current guidleines state it's not good practice I won't bother. On the flip side, while current guidelines state it could damage the cpc, if it ain't twisted then there's more of a chance of a cpc slipping out of a terminal after testing thus breaking the earth circuit which could go undetected until it's too late.