If a company is supposed to call you at 'the end of the week' and it is now the Monday after, do you get nervous? Do you think you've lost the job? Or do you just think companies are lazy about these things and will call whenever?
DK/DC: When was the last time you applied for a job?
EDIT: So I just called them and I'm not getting the job despite, literal quote, "being perfect for the job, but you're just a tad bit too introvert." I'm both pissed and devastated.