Depending on how you play, it may be true. If you cast the reverse time spell after battles that have gone badly, nights may appear to last longer because (I suspect) more battles go poorly in the nighttime. Hence more reloading, and hence the night going on forever.
I don't think I've really noticed much of a difference in gameplay. Thinking about it, though, I probably just ignore what's going on and plunge ahead. Except for when the salad bar's open, though... THEN, I'm really cautious and looking for things under every tree lead
