Green is absolutely treated specially in YCbCr; you just have to understand how YCbCr relates to RGB.
ITU-R BT.601 defines YCbCr as follows:
Y ~= 0.30 R + 0.59 G + 0.11 B
Cb ~= -0.17 R - 0.33 G + 0.5 B
Cr ~= 0.5 R - 0.42 G - 0.08 B
Y is given the most bandwidth, and green makes up 60% of Y. Cb and Cr are allocated substantially less bandwidth, and green still makes up a sizable chunk of the value. In total, green occupies about 2/3 of the bandwidth in YCbCr. That's pretty much the whole point of doing it---RGB spends an unnecessary amount of bandwidth on R and B.
ITU-R BT.601 defines YCbCr as follows:
Y is given the most bandwidth, and green makes up 60% of Y. Cb and Cr are allocated substantially less bandwidth, and green still makes up a sizable chunk of the value. In total, green occupies about 2/3 of the bandwidth in YCbCr. That's pretty much the whole point of doing it---RGB spends an unnecessary amount of bandwidth on R and B.(reference: http://en.wikipedia.org/wiki/YCbCr )