Excellent presentation from divio, would highly recommend to check it out, especially for designers or those who work with designers. The wireframes_design.pdf, referenced from the presentation, apparently is also available: http://redesign.python.org/assets/wireframes_design.pdf
I wonder if it good UX that the site is designed around first-time-to-python users (and sponsors maybe?) and recurring reasons to come back such as events and the blog (the actual python users) are way down in the footer?
Events and blog entries featured on new landing page proposal, I believe, are also intended for new users, convincing them that the language is actively maintained and has an active community around.
Experienced developers probably don't come to Python.org for development news and new events anyway—there are other channels, including fellow programmers.
Those new to the subject (potential developers or sponsors), though, have nowhere else to go and are 100% likely to end up on Python.org. They also can easily leave forever if not interested.
So, from this standpoint the UX should work well for new users first and foremost. If it does, it's probably good UX.
