I have had broadband at: 3Mbps, 6Mbps, 15Mbps, 25Mbps, 50Mbps and now I have 100Mbps+. I stopped noticing any connectivity improvement at 25Mbps. No commercial server anywhere, owned by anyone is going to let you suck data at a Gbps.
It is no wonder Giga-plans are not all that pricey, they don't really cost anything in actual bandwidth due to server side controls.