No

Journal of Clinical Endocrinology and Metabolism

Serum Estrogen, But Not Testosterone, Levels Differ between Black and White Men in a Nationally Representative Sample of Americans

Conclusions: Contrary to the postulated racial difference, testosterone concentrations did not differ notably between black and white men.

Yes

gladwell.com

gladwell dot com - the sports taboo

Black men have slightly higher circulating levels of testosterone and human-growth hormone than their white counterparts, and blacks over all tend to have proportionally slimmer hips, wider shoulders, and longer legs.

Yahoo Answers

Do blacks have higher levels of testosterone than whites? - Yahoo! Answers

I don't know how well the following is confirmed or countered, but a quick Google searched turned up the following, which indicates that blacks do, on average, produce more testosterone than whites.

t-nation.com

T NATION | Speed Demons: The Domination of Sport by Blacks

In the few studies that are available, blacks have a modest but significantly higher level of plasma testosterone (3-19%).

T NATION | Speed Demons: The Domination of Sport by Blacks

In the few studies that are available, blacks have a modest but significantly higher level of plasma testosterone (3-19%).

uk-muscle.co.uk

Are black people genetically superior athletes ? - Page 2

In the few studies that are available, blacks have a modest but significantly higher level of plasma testosterone (3-19%).

irongarmx.net

IronGarm • View topic - Speed Demons-non PC article for posterity

In the few studies that are available, blacks have a modest but significantly higher level of plasma testosterone (3-19%).

letsrun.com

Blacks have a higher testosterone level than whites? Is this proven?

I read an article in the Journal of the National Cancer Institute which showed that black men have on average 3 to 19 percent more testosterone than white men.