it's been more than half a year since the OpenGL 4.3 specs came out (August 6th, 2012). At the time the greens immediately had a beta driver capable of running apps. You didn't.
Now the greens have a stable driver. You still don't.
Half a year has passed and there is still no driver supporting it. At least you'd release a beta driver for developers, but no... It seems like as if we're not as important to you anymore. When I had to choose which platform should I start developing on, the main factor was the developer support.
I know there is OpenCL, it is great and I love it, but when it comes to OpenGL interoperability (among many other things), the standard is still inadequate.
It would be a shame if developers had to switch to green hardware to make sure they can develop OpenGL 4.3 applications.
So I'd like to ask you: please hurry up releasing at least a beta driver!