So Wordpress is an interesting example. Because the CVE assignment date has nothing to do with the release date of the patches. Wordpress doesn't request the CVE on their own.
So we're still at a 4-5 day delay (https://wordpress.org/news/2016/02/wordpress-4-4-2-security-...) for security fixes for a web-facing software. This is still far worse than just enabling automatic updates in Wordpress. I have not much problems if that would be a locally exploitable vuln, but web software usually is exploitable via web.
When it comes to web software I believe it's unacceptable to add any additional delay. (sure those bugs were not that severe, but as other examples in the blog show the problem with delayed or never updated packages is inherent)