I think people are jumping to conclusions a lot on this, not helped by lack of info from VW, hoping it'll gradually blow over I'm sure!
The defeat software does not affect how the cars drive. It only activates under test conditions, all our cars drive as they should.
The problem will ONLY affect us if our cars are detuned to the level of emissions the defeat software was designed to meet with no physical alterations, since this is for the US market it remains to be seen how it may or may not affect us in Europe. The "update" will likely just remove the cheat software and since all our cars are already in the market that'll probably be that.
Until VW tell us what the "fix" involves we just won't know, if indeed it is designed to bring all our cars down to the emissions levels tested in the US we'll all be shafted with performance definitely taking a hit, no way around the physics, look at all the 70's 5.0 V8's in the states pumping out 120bhp due to being strangled...
Ofcourse people are because they don't know whats happening... as I said see what happens... If people are not losing out no issue but if they are, they are more than in there right to kick off