Yeah and I've done that -
http://www.legitreviews.com/amd-radeon- ... ail_129583
And I've shown what water cooling a 290X does -
http://www.legitreviews.com/nzxt-kraken ... 90x_130344
There is hardly any performance variance with Uber mode, so you have to do all the testing in quiet mode to see the difference. I know another site just post up that breaking news yesterday, but my article stated that last month. The only difference between Uber and Quiet mode is the fan speed profile in the vBIOS. I'm not sure how many people are buying a $559 enthusiast graphics card and running it in quiet mode or putting a card of that caliber into a chassis with really bad airflow.
At the end of the day... I personally think AMD should just get rid of quiet mode as it's useless and gotten them a ton of bad press. Let users adjust the fan speed profile with AMD OverDrive in Catalyst Control Center, so if you want a quieter card at the cost of performance you can. Done deal.