Personally, I think they're overstating future Hispanic population growth. Immigration from Mexico and Central America has basically stopped, and birth rates are not dramatically higher among Hispanics, especially second- or third-generation. The Asian population in California is likely to experience more growth between now and 2020 than the Hispanic population. California may even still be non-Hispanic white plurality in 2020, and it definitely won't have a single majority population group any time soon.
Agreed. I read an article by the Pew hispanic research center that stated hispanic birthrates have dropped to record lows. I think the number was 2.1 if i'm remembering correctly, which is right at replacement level.
Whites, blacks, and asians were all below replacement. Immigration has also slowed significantly too, so I think many predictions for 2050 with a population breakdown with hispanics at 30%+ may be a bit aggressive. That being said, I do expect hispanics to be a majority in CA (they are all ready), NM, maybe TX (lots of whites going there too) maybe AZ, and thats about it. FL and CO are a bit of a wildcard though.
