The dodgy software doesn't affect the engines, but the real world performance will be higher than stated emissions it would appear.
But that is nothing to do with the VW scandal - it seems lots of people, the media, have lumped loads of unrelated stuff together. The fact that real world fuel economy (and thus emissions) do not match the stupid EU lab tests isn't news and it isn't related to the VW thing yet it's being talked about as if it is.
We've all been moaning on here about those tests for years?