Library impact on student attainment

I "stumbled upon" the Library Impact Data Project site as I was struggling to find research that determined the correlation of journal usage data from the OpenURL service to COUNTER data from the publisher (still haven't found that).  The preliminary data from this study at UK institutions is quite interesting and definitive - the distinctions of library usage across levels of degree honors is clear.

...and...

Here is a presentation from their first phase, which looked at in-house and print-resource usage:

JISC LIDP ILI2011

View more PowerPoint from daveyp

I would like to explore this more fully....For those who have been keeping up with this, what is your opinion of the research and results?