i think they will but do you really want to chance it?

if you are outside of the fudge factor (i don't know what that factor is), a key determinant will be the % of flights at each fare class (i.e., how often do you fly full fare). another factor will be which city (or cities) you fly from. out of newark/houston, i'd bet the fudge factor is smaller than out of atlanta, for instance.