Hi PPL
Before I get a barrage of moans, I work for a VW dealer in their Warranty Dept..... not VW themselves!!!!!!
As far as coil packs are concerned, the problem didnt really materialise until the new Polo appreared on the scene when EPC lights started coming on and no-one really knew what the hell was going on.
By the time that the coil pack fault became apparent, there were so many Polo's and Golf's already built and on their way to dealers it was impossible to effect repairs before so many had been delivered.
If you're worried at all, check the coils on your vehicle. Examine them closely and look for the word "BAK". This is the manufacturers code for the affected manufacturer "Bremi". If you experience rough running and cutting out with these coils in your car it would be fair to assume they're knackered.
If you're car is out of warranty, go to your dealer. VW WILL pay for repairs up to 3 years old or 100,000 miles regardless of whether your car's in warranty or not.