Back to facts:
The main problem with Michaels article is that he used an unofficial driver instead of Catalyst 12.2 which shows no watermark for me and was released only some days later:
Michael wrote: "As far as the Catalyst Linux driver goes, I was using an fglrx 8.95 series driver, which is very similar to the recently released Catalyst 12.2. This driver, which is marked as fglrx 8.95.3 and the OpenGL 4.2.11566 driver"
The Catalyst 12.2 shows me OpenGL 4.2.11554, so it is definitely not identical.
Second thing is, that my 7950 worked also with 12.1, with the only limitation of the locked clock speed, which is not a problem under linux at all, because there is no linux-game I know that would need extra performance of this card.
The only "real" problem WAS the watermark, which did not disturb me at all...
And on Windows it was almost the same. To use my 7950 I had to install a non-certified driver first...
Besides: I had an Nvidia GTX260 before and mainly switched to ati because of www.sebastian-siebert.de which wrote a very nice script for opensuse, that automagically re-builds the driver after a kernel-upgrade without any user-intervention. With suse-tumbleweed as a rolling distro and NVIDIA I hit the text-console almost every week and had to rebuilt myself...
@Michael & Phoronix: I like most of the phoronix-articles, there are (from time to time as in this article) too many repetitions and/or a bit too much complaining about things that are not as worse.