Asariah noticed this and posted his concerns in the Bug Report Forum (did you know there was a Bug Report Forum? neat huh?). Hortus spotted this report and informed us that the human female was the only one of the multiple races to receive a minor alteration from this, and that "it was decided that this was an acceptable change." Apparently someone up there at Blizzard is a big fan of 2000-yard, iris-popping, stepford-wife eyes in women!
For my part, though, I have to get up really close to my human female character to notice the difference -- and then when I do it makes me giggle uncontrollably. It's really no worse, in my opinion, than all those glowy reflections you see in anime girls' eyes. And to be honest, human women have always been a bit vacant-looking in WoW; they're better than human men, of course, but still don't usually look like paragons of profound intelligence. At least they don't bounce up and down like night-elf girls do.
[Via World of Raids]