We make it very clear in our interview scheduling page that we expect candidates to read the job description and understand what they are applying for before booking an interview call. If you want us to spend time telling you what you can read on our public job posting, we have little interest in investing time into you. Also - I personally apologize for the late arrival on my part. It is unfortunate but sometimes I do get caught up in business and things that have to be done. Since this interview, we have added an automated email to go out after the interview is scheduled warning candidates that we might be late to the interview due to the back-to-back interview schedules that we have to run.