Bigger box office numbers this week shouldn't be that surprising. This is the week of Winter/Christmas break for most people. After New Years Day is when we find out how much juice this movie really has.
I just found out that this movie won't open in China until January 5 (next year of course). That will add a significant amount to the global box-office that I think most people (including me) forgot about. TFA made 124 million dollars in China, so I can definitely see TLJ making at least 100 million dollars in China.