Board Thread:Level Sharing and Reviewing/@comment-7395353-20161113135008

...and I found the following numbers:
 * Slow Speed: 8.373 blocks/second
 * Normal Speed: 10.386 blocks/second
 * "Double" Speed: 12.914 blocks/second
 * "Triple" Speed: 15.600 blocks/second

I uploaded the level used for testing, too, and it's copyable. (ID is 26364297.) The level also contains a comparison of all of the speeds and an idea at the end. 