This is great news! Particularly for those that may have had issues with Google Analytics loading in their websites, as I have had with some of our client sites. Some of the issues that I have personally experienced with the traditional tracking code are:

• slow loading of the web page
• inaccurate data

The asynchronous tracking script should resolve these issues by optimising the load time of the script. This improves tracking and impacts less on the users experience (waiting for the the page to load).

The new script is still beta. Thus, one can't access it from their analytics account just yet. However, you can implement it by following these instructions, Google Analytics asynchronous tracking installation. I have already implemented it, it was easy, and tracks perfectly. Now I am just testing some of the scripts tracking methods.