Without fanning the flames unduly, I'll note that VE is already enabled by default for all registered users on de.wikipedia.org, and that the linked vote on the de wiki was just initiated today and has not yet even proceeded past the "do we think the question is well-formed enough to vote on" stage (please correct my German or bureaucracy-grokking if I'm wrong here).
I don't intend to offer an opinion one way or the other, just noting that I was unable to verify the claims made from the links provided. Please don't have all the German-speakers in the world email me their dis/pleasure personally. (I'm not the hacker you are looking for!)
On topic, it may be worth mentioning the VE opt-out preference in the deployment calendar. I believe this was deployed on July 24, but I'm not familiar enough with deployment-ese to know how this would be listed on https://wikitech.wikimedia.org/wiki/Deployments (or if it should be). --scott