I cannot ping point one place. But overall, the response is much slower than version 4. For example, go to next page is slow and this is critical and we need as little lagging as possible.
We have deployed the beta version to our worship team since the version supports HD. However, due to slowness, we may rollback to version 4.
Be aware that changes happen on the click-release, when you lift your finger from the key or mouse button, not when you press. You can press right on time but its when you release that things actually happen.