"We are pleased to announce the release of our first SD card image based on the Raspbian distribution," RPF said via its official blog. "This is the result of an enormous amount of hard work by Alex and Dom over the past couple of months, and replaces the existing Debian squeeze image as our recommended install."
"If you're still using Debian squeeze, you will benefit from many tweaks and performance improvements to the firmware, kernel, and applications. If you're already on Debian wheezy (beta), the performance boost won't be as big but will still be 'very worthwhile.' It's the first official image to take full advantage of Raspberry Pi’s floating point hardware for, amongst other things, much faster web browsing."