CarbonLimited have posted a more informed and detailed view on whats wrong with the Code:
The requirement for all homes to be zero carbon by 2016 is going to fail unless we take action now. In particular, a set of interim requirements under the Code for Sustainable Homes must be imposed on private house builders. In addition, the Code must allow more flexibility in how zero carbon is achieved … continues
Links:
isite: whats wrong with code level 6
Fairsnape 
Pingback: Code level 6 too easy ? - go to level 7 or beyond « isite
Pingback: Hanham Hall « isite
Pingback: is the code for sustainable homes working « isite