I'm willing to be corrected by somebody who has a better grasp of biology than me but I would have said that evolution simply requires change which can subsequently be acted on by natural selection.
Yeah. I was trying to avoid asking Someone Who Cares to define genetic information and describe how it can be measured (on the grounds that everyone else had so it was probably off topic ).
However your point about why does a wing require more "gentic information" than a feathered arm and hand is a good one.