I positively hate that Oracle in its wisdom updates the very useful Java Tutorial with stuff hat isn't even released yet. Where do I point folks who want to learn Java now without running the risk of confusing them? Some of the updated pages linked in the blog do not warn about covering pre-release features, and I see no links to the pre-Java 8 version.
Actually, my problem with the Java Tutorial is that it is very difficult to find the new material without wading through all the old material as well. It's not an effective way to learn Java 8 if you already know Java.