i dunno thats kinda hard to believe honestly. seems to me it would just ripen faster or prolong the end. its not like your are total jacking with the schedules. i guess we will seee
It depends on the strain, and the late-bloom health of the plants.
It might fuck up the ripening totally. Expect a week more if they're healthy - atleast - or a semi-fucked grow if they are in poor health late in bloom.