When your typical business egress is well in excess of 10-15Gbit/s, the billing model for big enterprise is radically different than just leasing an OC3 and paying flat-rate per byte. Such enterprise scale deployments negotiate multiple optical carriers for multiple datacenters then buy bandwidth billed by $/mbit of their sampled peak egress at 95th percentile on a month-to-month basis.
For the privilage of having pretty much uncapped bandwidth - I've no doubt that they're paying somewhere around of $40-80 per megabit/s, at 95% percentile. (varies by datacenter and region) Consider that 12Gb/s peak egress (@95th %ile) would cost a between $600K-$1m per month.
If Jim had moved his multi-terrabyte data at wirespeed possible between datacenters e.g. untweaked a GigE typically puts out around 300-500mbit/s - he could easily move the egress 95th percentile upwards - increasing the billing for the whole datacenter. When you have multiple OC192's, latency becomes the only real bandwidth cap.
Its too easy to forget that at such scale an casual drag/drop could cost $1000's... Of course telcos are love you chewing more bandwidth - their meter is always running.