Why is the woman being complimented?

M: Hey, congratulations. I just heard from Mr. Shaw that the directors have come to a decision regarding the proposal you gave at this morning’s meeting.(65)
W: Yes, I just heard the news myself, and you wouldn’t believe how relieved I am. I mean, considering the number of days and nights the guys on our team worked to prepare for this morning’s presentation, I had to get the approval. I was so afraid that I would not be able to convince the directors. But, I guess I did all right.
M: Are you kidding? It was perfect. I thought it was one of the best speeches you have ever given.(66)In fact, I wasn’t too sure about the possibility of the project myself until I heard your speech. You really did a good job.
W: Thanks. I owe it all to my staff.(67)This calls for a celebration.