Final answer:
Without the specific January 2015 McKinsey Analysis, we cannot provide the exact percentage by which diverse workforces outperform less diverse ones. However, the concept that increasing diversity in the workforce correlates with enhanced organizational performance is supported.
Step-by-step explanation:
The January 2015 McKinsey Analysis is not explicitly mentioned in the provided reference materials, so it is not possible to give a specific percentage by which diverse workforces outperform less diverse organizations based on that exact report.
However, the provided content highlights the importance of workplace diversity, indicating that racial and ethnic diversity in the U.S. labor force is increasing.
The materials also touch on the labor market discrimination present in various forms and the progress of women in moving up the corporate ladder.
A separate study by Hoogendoorn, Oosterbeek, & van Praag (2013) found evidence that points to the positive impact of gender diversity on team performance, but again, the specific percentage of outperformance is not provided.
Given the broad context of these discussions, it is clear that an increasingly diverse workforce correlates with improved organizational performance and reduced discrimination in hiring practices.