>>3188955>Until recently, however, only the RGB pattern has been employed due to issues with color fidelity and sensor manufacturing, although the CMY pattern has much better quantum efficiency and spectral response. CMY-based patterns have, in fact, been used in thevideo world for years. Now, though, due to groundbreaking advancements in sensor design and a better understanding of system noise sources, CMY deployment has become
possible, bringing important advantages to the camera designer.
>The major advantage of the CMY-based filter array is sen-sitivity. In photographic terms, this sensitivity results in
superior performance across a wide range of light expo-
sures (ISO ratings). The improvement is the result of two
main attributes of the CMY CFA: better light transmission
and a stronger color signal.
Face it, RGBG sucks.
>http://www.jayandwanda.com/dpreview/sensors/kacBetterColorCMY.pdf 
