True, but a quick comparative analysis against other movies using a daily breakdown would show that 8 million isn't really all that great. It would trend towards a 40 million yield after 30 days, if word of mouth doesn't drive off any further attendance, which it very well could.
I used boxofficemojo to arrive at the same assessment.
You can review "Daily Box Office" to set up any comparison you'd like and see where it leads the numbers. Handy tool, to be sure.
So much for estimates of 30-40 million, looks like 26 if they are lucky.