Not surprised at all. If I were Apple, I'd want to be in control of my end users' security. Message encryption through Apple servers is something Apple can protect and secure, instead of relying on a third party service. Let's not forget that iChat/AIM services are archaic; it's time to move on to bigger and better. ;)
Been waiting a long time for this, but I will say it would be nice if Messages/iCloud/FaceTime were a bit more ironed out before the move was made. It sure seemed like a lot of users held onto iChat/AIM because Messages wouldn't function properly. However, it seems resolved for the most part.
Here's to moving forward.
Yes, iChat needs to die.
We have contacts in one app, text and video chats in another, mails in a third, [facetime] video calls in a fourth.
Somethings gotta give.
[I was describing an off my head idea for how I would handle OS X mail, contacts, facetime etc. But I ended up blowing my own mind and have now hidden the idea away in my TRONgui archive of ideas. Brian grows horns and attempts to throw an evil laughter].