Fridays as a rule tend to be the busiest days, but based on what I saw myself tonight and what I heard on Wednesday, the general crowd level is very low this week.
Last night my hubby and I went and held our hands straight out to either side while walking through Hogsmeade just because we COULD! I have never seen it so empty!! (except for a private event I attended) It was amazing. If tonight was twice as crowded you'd still have a great time.