During the Spring Festival, my colleagues and I sent messages to the leaders. Her reply was quick, while mine was late in the morning. Is the leader more optimistic about her?

You think too much. There are many things at home during the Spring Festival. Maybe the leader is too busy and too many people reply at the same time. This is normal. If you have to think about it more, you can also think about it. It's early in the morning, and the leader will give you feedback. How much he cares about you and values you. Don't you think so? Hehe, sometimes it should be simpler, and many times it's just your imagination.