Kabel Deutschland, Germany's largest cable provider, achieved a record download speed of 4.7Gbps in a recent test:
The massive speed boost was achieved by combining two of Arris's cable modems, each of which accessed eight bonded Annex A (8 MHz) channels. The Assis press release says that this was a real world test; the download speeds were achieved via a cable plant in a school located in Schwerin, Germany. It might have helped that Kabel Deutschland also upgraded that cable plant to 862 MHz.
According to Kabel Deutschland's Chief Technology Officer Lorenz Glatz:
Using this technology, a feature length movie could theoretically be downloaded in 8 seconds – at speeds faster than a standard laptop or modem can even process – demonstrating that today's broadband cable network is already a high performance and sustainable infrastructure offering huge untapped potential.