Re: Oh dear god
My word, that's a pretty prickly reply - did open-source software kill your parents or molest you as a child or something?
As far as lost productivity goes, that's par for the course when moving to any new software - open source or proprietary. As for FOSS alternatives to the products you mentioned, you're right in saying that there isn't currently a decent alternative to AutoCAD but, as a sometime-graphic-designer, I have found Scribus, Inkscape, The GIMP and Blender to be pretty reasonable alternatives to Quark Xpress, Illustrator, Photoshop and Lightwave - and they're rapidly improving.
I'm not sure, though, that this story is a good reason to switch to open-source, unless your company habitually commits copyright infringement and breaks license agreements on a whim.