Springer has released eBook Use and Acceptance in an Undergraduate Institution.
Here's an excerpt :
The survey finds high use of eBooks at Wellesley College, with 70% of the respondents indicating they have used eBooks. Other recent international surveys of eBook use have shown 52-64% of students or faculty responding that they have used eBooks (Figure 10). Within the general U.S. population 21% of adults reported having used eBooks in 2011. Some eBook use by Wellesley students and faculty may be non-academic, leisure reading, but half of Wellesley's eBook users report having used eBooks from the Wellesley College Library's collection.