I'm afraid not maui_mallard.
The speed quoted on Gigabit Ethernet is for LAN (Local Area Network) speeds i.e. between computers in your home / office network. It does not have any effect on WAN (Wide Area Network) i.e. your connection to the internet and other computers over the internet.
The WAN speed is limited by the speed of your internet connection as provided by your ISP (Internet Service Provider).
I wish it did too!