I have a friend who signed up for Steemit 2-3 days ago, and he still hasn't been approved. As I remember, it only took around 12 hours when i signed up.
Could be because a lot of new users are signing up at this time, but I don't know... If that is the case, it makes me happy, because it's a sign that Steemit is growing rapidly!!
If you know why it takes so long, please leave a reply..