Induction question for past due

Emily
I am a FTM and just had the cervadil inserted to start the process of inducing labor. I am 40+6 and haven't been dilated at all, just 50+% effaced.
For other mommas induced past their EDD, how long did it take? The nurse said to expect a Saturday night/Sunday AM baby which just seems really long! Is she bracing me for the worst case, or is this average?