Just a note that Brandon just commented on the patchset:
"We discussed this patch today during our weekly design team meeting and how to move forward. At this point in time we are leaning towards +2'ing this but we want to have a bit of discussion internally before doing so.
We'll have something at the end of the day, so we're asking that no one merge it until then."
I think that's a completely reasonable request.
Thanks to everyone who's been speaking up in support of positive changes to our typography while also being constructive and critical as appropriate. I think one of the cool things about Wikimedia is that we're willing to try and experiment even at the risk of causing breakage and disruption, but the flip side of that is listening to each other and optimizing things together towards the right outcome. We've got tons of smart people around the world helping with this, which is awesome. As always, I have confidence in our collective ability to figure things out :)
Erik