We mentioned yesterday that iPhone OS 3.0's Mobile Safari Browser was being reported as faster than the current iPhone OS 2.2.1 version. Now Ars Technica has run the numbers and the results are pretty impressive. Check out their full report for all the details, but this sums it up nicely:

According to our sources, the 3.0 beta still has some stability and speed issues, so that makes these results that much more impressive. While the overall average gives the iPhone 3.0 beta a 300 percent speed advantage, some of the individual tests show 6x, 8x, or even 11x improvements—the bitwise "AND" function even runs 16x faster than in the current version of Mobile Safari.

Should make the release version of the new, Nitro-powered Mobile Safari 3.0 fairly impressive, come summer! Bring on them multi-app Facebook pages, the iPhone will be ready! (Joking... a bit.)