Everything is on schedule. Around this time in 2010 and indeed 2011 we were starting to get some details of the M5 and M6 respectively.
There is still a long way to go as M development is robust and thorough .
Some cosmetic details such as wing mirrors etc are not necessary yet but as we approach that time just before the concept will be shown at Geneva in March 2013 we will see full semi-disguised versions. Although some more color is now available in these disguised prototypes.
Hopefully now you can see the details I was trying to capture in my (crude) sketches.