Propublica's summary of the congressional report is very concise http://www.propublica.org/article/the-for-profit-higher-education-industry-by-the-numbers
Here is one very apt comparison:
$2,050: Average amount publicly traded for-profit higher education companies spent on instruction per student in 2009
$7,239 : Expense spent on instruction per full-time student at public institution in 2009-10 (Source: The Condition of Education 2012, National Center for Education Statistics)
Majia Here: I think these stats are very telling.
Here is a link to a longer essay I wrote on the subject: