This may be the case, but it might also turn out that the team is no longer checking in rushed and untested code as they hurry to get out of the office and go h

This may be the case, but it might also turn out that the team is no longer checking in rushed and untested code as they hurry to get out of the office and go home for the evening. Instead, the may just hold off on checking in the code until the next morning, at which point they've slept on it and possibly thought about some edge cases they should test further, etc.