I'm just surprised that there are players that think to release the button while leaping towards a wall that they want to hang on to for dear life. It makes sense that I'd wanna hold the button down as hard as Ajna should be holding that axe, right?
Actually, I've noticed in some playthroughs where people are struggling with the axe-cling, that they tend to have the most trouble with the first couple clings, but then they hit it more consistently at greater heights. This is probably because a lot of people naturally feel more desperate to hang on as they climb higher, and so they're instinctively pressing the button down longer to nail those clings. It's interesting to see those emotions conveyed through gameplay.
In any case, all that stuff is mentioned in the How to Play section of the Pause menu anyway. Oh man, if only every game I rented back in the day had an in-game How to Play section...