I've read that the CLS had earlier stated that this report would be based, for the first time, on 2010 Census data.
Any Freeper that can explain how that would change the data?
Yes. For the first time ever, the 2010 U.S. "Census" used estimated numbers rather than an actual count.
"It is enough that the people know there was an election. The people who cast the votes decide nothing. The people who count the votes decide everything." - Iosif Vissarionovich Dzhugashvili (alias Joseph Stalin).