In fact, upgrading from 5Mbps to 10Mbps results in a mere 5% improvement in page loading times! In other words, an average consumer in the US would not benefit much from upgrading their connection when it comes to browsing the web.
However, the latency graph tells an entirely different story. For every 20ms improvement in latency, we have a linear improvement in page loading times.
Latency is the web's bottleneck
24 Jul 2012