Pictures of Panasonic 12-35 and 35-100 caught at IFA 2011

Focus Numerique has spotted two pictures of the upcoming Panasonic 12-35mm and 35-100mm Micro Four Thirds lenses at the IFA 2011 trade show. PowerOIS is there but no signs of aperture range. If you do the 43M43-2X math, these are the "35mm equivalent" of the SLR-trusty 24-70mm and 70-200mm. Why are they not revealing the aperture? Is it because it is not constant f2.8? Is it worse? Or is it better and they are saving it as a big surprise? UPDATE: Ranger9 raises the possibility in the comments that they may actually not know yet, which sounds like a more reasonable explanation :)