A casual google search found this PDF which contradicts most of what this blog postulates, at least among the fastest growing racial groups.
http://www.highereducation.org/reports/pa_decline/pa_decline...
The Higher Education paper uses current statistics on changing demographics in the country, and the number of workers in those demographics with a college degree, to project into the future. They predict that the educational gap between whites and minorities will increase.
These are not mutually exclusive conclusions.