I don't work there so I don't really know, but I do know that I usually don't use Django for the reasons listed in the blog post -- namely that you have to live in their world view to write Django.

No, the reddit project itself is still based on Pylons. However redditgifts (the reddit marketplace) is based in on Django so reddit does have Django.

Do you guys know what they felt about Flask?

At the time that we switched to pylons and decided to punt django, flask didn't exist. I believe it was some time on '07 or '08. I'd check, but I also think it predates our switching to git from subversion...

Personally I like flask a lot and it's come a long way. Also, when spez and I moved on to hipmunk we started using tornado.

The switch to Git happened one day before we open sourced on June 17, 2008, I remember that day well :) So yeah, the history of when we switched to Pylons is probably lost forever sadly. But yes it was right around when I started in March '07 that you guys started working on the transition.