Rubbish. Skodas and seats are EXACTLY the same under the skin as current VWs. Same engines, suspension, brakes, transmission etc etc. Same good points, same bad. For example the new Octavia VRS is a Golf Mk5 GTI, but for a couple of grand less. The Leon Cupra R is a Golf GTI with an Audi S3 engine!
They just have different body work and trim and even have better equipment levels!
Trust me I work of VW, and if I was spending my own cash on one I would never buy a VW over a Skoda or Seat!