That page is a chart of results for many of the previous models. As one can see, the iPhone 5's results are 2.55x better than the iPhone 4S. However, that should be taken with a grain of salt since we only have one iPhone 5 result.
There's more context and links here: http://www.macrumors.com/2012/09/16/iphone-5-benchmarks-appe...
TL;DR: iPhone 4S scores 623, iPad 2 scores 751. The iPhone 5, linked here, hits 1,601, according to Geekbench.
That page is a chart of results for many of the previous models. As one can see, the iPhone 5's results are 2.55x better than the iPhone 4S. However, that should be taken with a grain of salt since we only have one iPhone 5 result.