JakeWharton/ActionBarSherlock — comment on commit 47b75e30ddcdb3962ec419ca886590dda774897a
File:  line 0
By JakeWharton:

Holo is 3.0+, DeviceDefault is 4.0+. We choose Holo so that we'll get consistent styling when OEMs put crap like Sense and TouchWiz and MotoBlur on their phones.