Just because my puppy has slept through the night in her crate for the first time, and it's only her second night.
The first night was horrendous but we did everything we were told, to go downstairs pretend you are ignoring, if she goes quiet, then she's ok, she just wants you, so go back to bed and ignore.
Or I am too optimistic and it's too early to think this might happen again. I got loads of advice from the rescue centre they said it could take up to a week.