I'm not going to speak for everyone else. I work in the print graphics industry, and oftentimes we use a mix of both raster and vector. The file sizes of pure vector is much smaller than that of raster, but the types of images are like apples to oranges. Photographic work is raster, and near impossible, nor practical to convert to vector (unless you are going for some sort of stylized appearance).
But suffice to say, unless some plugin, or filter needs to be applied to a vector image, then no I don't use photoshop. In most cases, if a plugin or filter needs to be applied (like a drop shadow, or blur, etc) then I will apply that to a duplicate, and then import/use the resulting raster along with the vector art together in coreldraw or illustrator, etc.
In about 90% of the cases I am doing my own printing however.
An example of the type of vector work I do (Mostly technical illustration) can be found
here. You need to click on the thumbnail image that appears to view the tutorial. It is a brief tutorial on how shading and layering can be achieved using vector software. It is a 'technique' tutorial showing the concept. It is not a 'step by step' tutorial explaining what buttons to click/how to create the artwork.