Well for me, the 1" difference means that I can fit it in my purse. That may not seem like a big deal, but having one bag to carry is awesome. Also, I am a petite woman (5'2" with small hands, and a small lap to sit my laptop in if there isn't a table handy) so the proportions of the 11.6" are not a compromise for me. I can see why a man would find them a compromise though.
For petite women (and men too I guess), no argument from me. The 11" version is likely great. I understand the purse comment as well although most men don't carry purses.