It's true, but moving our huge codebase to Python 3 is a big undertaking. We're making progress towards it by using Python 3 constructs for new files, etc. For my personal projects I'm already in the process of moving over.
I ask because I started to learn to code with Python 2 because that's what was preloaded on my system. Is one over the other a big enough deal at a beginner level that I should switch to 3 now? How much of a learning curve am I in for?
No, at a beginner level it's not, there are many guides that explain the differences at a beginner level, and you can go through those in a few hours at most, for example http://python-future.org/compatible_idioms.html
But, if you start working now on a Python 2 project and that project starts growing significantly, then it will be hard to convert the codebase. That's why you can see people saying that they didn't switch yet, it's not that they don't know Python 3, it's that upgrading large legacy code bases is hard (not only in Python).
My biggest program is like 100 lines of code maybe. So I will go ahead an switch now. But it's like 10pm where I'm at so here's hoping I don't play too much...
Now the rest of upgrades were a bit painful (I was using some functional programming stuff, httprequest libraries, etc.)