When dealing with phasing potential, it's not uncommon or farfetched to see swings of multiple hundreds or miles or more from run-to-run or even mode-to-model. The difference between a phase and no phase can end up substantial. Hell, even the difference between a phase and just a partial phase can be massive in terms of low development and track. The end of week/weekend was always very low potential but the changes needed to get something aren't terribly substantial.