Micro four thirds - does the crop factor apply to MFT lenses as well?

patrickestarian wrote:

To calculate the focal length and the aperture of a non-mft lens on mft sensors we use a crop factor of x2.

Now I wonder how the aperture number on the "original" mft lenses are calculated? are they before considering the crop factor or after that? For example, when an original mft lens is set on 2.8 is it really 2.8? or 5.6? because those lenses are meant to be used for MFT cameras only and you would think that there is no point of printing 2.8 on the lens when it always means nothing but 5.6.