I was in a bike shop that has a Cannondale for sale, an older model that has a Campagnolo decal on it, on the top tube, large and very visible. The decal is definitely under the clear coat of the OEM paint. The bike had Campy components front to rear, including Ypsilon rims on Campy hubs. They've since been replaced for the most part with 600 tricolor in places. It's clearly a Cannondale, but the decal is clearly under the OEM clear coat. Was it perhaps a promotional thing?