There's a time factor involved as well though. A byte is cheaper to transmit at 7am than at 7pm (less congestion). Business ISP's often charge based on the 95th

There's a time factor involved as well though. A byte is cheaper to transmit at 7am than at 7pm (less congestion). Business ISP's often charge based on the 95th-percentile bandwidth rate during the billing cycle: http://www.semaphore.com/blog/94-95th-percentile-bandwidth-metering-explained-and-analyzed http://www.semaphore.com/blog/94-95th-percentile-bandwidth-m...