No, neither have I. However, according to this article in Wired (brought to my attention through boingboing), hard studies show that Asian Asians are significantly more observant than European Americans.
In one study they tracked the eye movements of Chinese students compared to European American students when looking at a photograph, and in another, Japanese and Americans were asked what they observed in an underwater scene. In the first study, the Euro Ams looked more at foreground objects and the Chinese looked at the whole scene and background, as well as foreground. In the second study, the Japanese gave 60% more information on background and twice as much information on the relationships between background and foreground objects as the Euro Ams.
And as to what we all want to know, how did Asian Americans do:
"Reinforcing the belief that the differences are cultural ... when Asians raised in North America were studied, they were intermediate between native Asians and European-Americans, and sometimes closer to Americans in the way they viewed scenes."
Intermediate? Damn, maybe Asian American studies got it wrong!