MIDUS Study participants (all Americans) were asked how closely do they identify with their race. Answers were scored like this: very closely (4), somewhat closely (3), not very closely (2), not at all (1). I calculated the means for whites by ethnicity:
Mean racial identfication score (sample size = 4,088)
All whites 3.18
Looking at all whites, the typical person is somewhere between identifying somewhat closely and very closely with his race. The difference between Greek and Spanish Americans is sixth-tenths of a standard deviation--a pretty big gap.
There might be a tendency for the pride among minorities like Greeks, Jews, and Mexicans to spill over into racial identification. Ethnic pride might facilitate racial pride.