There have been additional experience enhancements announced today, focusing on experience awarded for killing enemy players in Open RvR areas:

With the addition of the new region-wide and RvR-wide chat channels we have seen a marked increase in Open RvR participation. In order to encourage this trend even further, we have made an additional adjustment to the experience awarded for killing enemy players in an Open RvR area. Previously we increased this amount by 50%. As of today, that bonus has been raised to 100%. With this change players killed in Open RvR will now be worth double the experience than those killed in scenarios!

We've included this phase of experience enhancements in our forums.  You can also check it out at WAR Herald.