Some you win, some you loose. I reckon that upto 45 degrees of twist is manageble.
Problem is, you can saw it instead, but that's just hiding the problem and it will come and bite you on the butt later, forewarned is forearmed.
It's not quite so bad on an ELB, I think wide flat bows suffer more if the wood is twisted.
You can sometimes lay the bow out on the diagonal and get away with it.
A twisted stave is still better than no stave.
Del