The one caveat not highlighted in your article is that while overall trends in deportations have been decreasing, the exception to the rule is Guatemala. Since 2009, the number of deportations has been increasing. This is consistent with data just published by Immigration and Customs Enforcement (ICE) detailing similarly that Guatemala is the only country evidencing a growth in apprehensions along the border:
2010 2009 2008
Guatemala 18,406 15,575 16,395
The importance of these developments is that final destination points such as Chattanooga, TN and Dalton, GA will continue to remain important sources for the in-migration of Guatemalans in spite of the failed enforcement policies of the Obama administration. It also reinforces the need to devise a comprehensive approach to the immigration issue that contemplates mitigating factors and solutions in the sending countries.