Sorry if this is redundant, but doing my own research on this Google issue I ran across a YouTube video of Arizona States' head Information Technology Officer.
He's definitely singing Google's praises (the video is posted by Google) but he makes some solid points.
Here's the link if anyone is interested - I found it informative - it's a summary of how Arizona went about it and their perspective of why they switched and
how they feel they benefited- It's only 4 minutes long: