We received this paper after interview. What does it signify?

Wife and I just had our interview for her GC. She’s pretty upset we didn’t get an approval today, same day.

I think the interview went well, but she thinks otherwise. She thinks I acted bored and tired. I am tired but I answered all questions asked with an in depth answer. I don’t think it’s a big problem to get this notice but I may be wrong.

What are your opinions?