Nothing wrong with Shutter Glasses
2011 spec shutter glasses from all the manufacturers are a vast improvement on the original Infra Red-driven tech of previously. There is no bleedhtrough across eyes or any problem whatsoever where compatible products are used.
This reviewed set is either a Friday build or Dixons has gone and bought a job lot of crap that couldn't be sold to the locals in the Far East and so has been dumped on Blighty.
Passive is unlikely to ever look as tight was active technology, but it shouldn't be a stark difference as the reviewer has witnessed. But then, I tend to shy away from any of Dixons own-brand stuff. It is generally C-grade nonsense.