Gigablast Speeds Not Obtainable?

Allan, would you please clarify exactly what "72 business hours" means?  I spoke with a Cox representative a few weeks ago who said that business hours are 8:00am to 8:00pm M-F, excluding holidays.  He implied that "72 business hours" is the accumulation of just those business hours.  So, in the absence of a holiday, saying 72 business hours is a subtle way of saying eight (8) days.  I hope he was just confused and 72 business hours really means three business days, i.e excludes holidays and weekends.  If that is in fact the case, why not just say three business days? Thanks.