Where has this sample been taken? What colleges? How diverse was the population? Socio-economic statuses? These are all big concerns I have with this statistic. Also, what are they measuring? English? Maths? Sciences?
With all the high school emphasis on getting into college, I would not expect a serious improvement in the maths and English. If it's looking at general stuff, then yes, I would not expect a substantial shift, if we're talking about fields and careers then this is shocking data.
Given all that. I am a college junior, I have learned so much about math (calculus), science, computer science and how to solve problems. More so then I ever could have dreamed. College has opened me up to many new learning opportunities.
While the fault could be at the college, more then likely; however, it's on the student, not the school.