Those are good examples of straight strokes at extreme angles - they'd be miscues on a CB. Do you think it matters whether they're straight or swooping hits?
The cue ball only "knows" at what angle the tip is moving at the moment it makes contact - nothing tells it what direction the tip was moving even a microsecond before contact. So the tip's effect on the CB is exactly the same whether you start with the stick angled at 10 degrees or get to the 10-degree angle by swooping your stroke.
Here's a test: Use a marked cue ball (maybe an object ball) with the marking facing you so you can confirm that you hit the same spot on the CB with a normal "parallel" english stroke and your "swipe" stroke. Be sure the CB goes in the same direction both ways (perpendicular into a rail) at about the same speed (so it stops about the same distance), and see how much angle change you get. If you really test this carefully I promise you won't get more spin one way or the other.
pj
chgo
I dan't know. I kinda agree with Hu. I don't have any science or experiments, just the fact that when I'm playing really well, I always feel like I can go through the cue ball at different angles of attack for greater/more accurate CB movement.
Lou Figueroa