I think the amount of study required is very much down to the individual.
Some worked every night and most of the weekend, most followed a pattern something like Gonzo/AJ and others did practically nothing until a week before exams.
All of the styles worked (and failed!!) for different groups of people during my time there.
My view was always that I would have been very unhappy to fail something due to lack of work so worked very hard from Sun to Thurs. Friday night was blowing of steam(beer) night and Sat was a day of whatever I fancied.