That was my first thought too, but when you think about it, it DOES take a makeup trend a while to really gain traction with the general public, so doing a whole orange collection for 2013 is better business sense than if it'd been done for 2012.
I think all the new textures and formulas the products out there have make strong colors like orange a lot more accessible now than back in the day when everything was thick and heavy like sludge.
I am specifically remembering my orange frosty blush from 1982!