WesleyW said:If you read carefully what Patrick Johnson said, than you will know why it works especially using draw and not using follow. The most important part is, from Patrick: "Unless the amount of swerve in the shot just happens to exactly match the amount of squirt".
Let me explain. When most peoples talk about using english, they will mention deflection (squirt). But they forgot swerve. When you are using left english, the CB will squirt to the right, but swerve will move the CB to the left. In reality, we only see the CB go to the right direction, because the squirt are higher than the swerve. How can you apply maximum CB swerve? Exactly! Hitting above center. When you are using follow, you are applying unconscious swerve. To explain it more simple. When you are hitting low left, the CB will go to the right. When you are hitting high left, the CB tend to go to the left. I've experiment this with a few peoples and by myself. And this looks to be true.
The conclusion is (with a regular deflection shaft):
1) Hitting left, the CB go right.
2) Hitting low left, the CB go even more to the right.
3) Hitting high left, the CB goes a little to the left
I think 2 and 3 are reversed for most shots. Hitting high usually causes more swerve than hitting low, because the downward force on the cue ball from hitting high causes more "masse spin" (as if you're hitting with more downward angle) and also causes it to "act" more quickly (because you're pushing the cue ball more forcefully into the cloth).
pj
chgo