I don't know. Nearly all the IE9 users are on Win7. If I had to guess, it's simply because upgrades are such a hassle in heavily regulated industries. (Above

I don't know. Nearly all the IE9 users are on Win7. If I had to guess, it's simply because upgrades are such a hassle in heavily regulated industries. (Above and beyond the typical hassles of an upgrade in any large enterprise.) I see similar numbers in Healthcare, for example, but not Education or Construction. I keep meaning to do a blog post about the tech trends in different industries.