Wow, I'm all for EOL'ing old versions of IE, but I'm surprised at the complete lack of notice (on a corporate scale). Was this known to be in the works for a while?

My thinking is just that most larger companies will have zero chance of hitting a January deadline, and once the deadline passes, there's really no urgency to upgrade by any particular time. I would think a ~12 month deadline might be more effective in getting people to upgrade (as well as resulting in fewer compromised browsers).