For me they do: I swam a Short Course Meters swim meet today at the Stephen E. Schofield pool at Pierce college. I swam four races and besides the fact that my times were so bad everybody was holding their nose when I exited the pool, the headline above is probably a phenomena that only applies to my flip-turn issues your version of reality may very.
When a pool merges from the deep-end to a remarkably shallow bottom; (4-feet-deep or so), the space around the "+" or the cross on the wall distorts making the "+" appear closer than it really is. I feel I lost .25-of-a-second on each shallow-end turn just trying to work out this quasi-optical illusion.
In practice, I had to swim into the wall as if I wanted to purposely jam my turn just to get the right distance or "spring" off the wall. As I approached the wall the line got "wider" since it was suddenly close and the "+" seem bigger or closer, hence, I was flipping to early at first.
I hope I am making sense. In the deep end you have all this volume of space surrounding the "+" but in the shallow-end, the "+" looks bigger and the line on the bottom much wider when the surface and the bottom of the pool are so compressed making a wall look way closer than it really is!
Below is a video Rob D. shot of me in the 50-free; I am first in the water and it goes downhill from there. I am very grateful he took the time to do that.. Rob of Robaquatics has been very good to me and this blog and I recommend that you bookmark his site. He has a whole writeup on the meet and lots of photos of the new pool. BTW, the weather was in the middle 70's! :-P