I guess I don't really understand why anyone would want to mess up a perfectly great group by mixing it with components from another manufacturer?
I'm a Campy guy and would never mix it with Shimano only to get mediocre performance or vice versa. The groups are created/engineered to work together, not with other companies components. The way I see it is that people like certain shifters/brake levers...(understandable since that is a contact/interface point) so why don't they just go with the rest of the components that match the shifters they like?
I'm just trying to understand others reasoning to mix components...