I have noticed with individual snakes it can certainly make a difference.

My old corn didn't care when it got fed.

My coastal refused to eat during the daytime when I first got her, stress of being shipped and all, but now she'll eat whenever. There is a noticeable difference in her EAGERNESS to feed however, because she's a lazy eater during the day but absolutely SLAMS her feeders when I feed at night (which I do 99% of the time with her)