[Swordmaker]

They may have meant gigabytes, who knows.

Connections speeds are always listed in bits per second... not bytes per second.

[CarrotAndStick]

I think you’re right. It must be 40 Gigabits/second, which is aprox. 4 Gigabytes/second. A DVD is approx. 5 Gigabytes worth of data, and this article mentions it takes less than two seconds to transfer one...