Well, if you go to python.org and ask "Should I use Python 2 or 3?" the prominent answer is:

Short version: Python 2.x is legacy, Python 3.x is the present and future of the language

That's very close to what deprecated means.

If "deprecated" allows a very long period of time before actual end-of-life, yes; Python 2.7's current scheduled EOL date is 2020:

http://legacy.python.org/dev/peps/pep-0373/

Yes, it does. If something is deprecated, that just means people are advised not to depend on it, usually because it's going away. https://en.wikipedia.org/wiki/Deprecation It doesn't mean that it has already gone away.

I think you're right. I just believe Python 3 to supersede Python 2 is going to be hard and companies will have to support both language bases.