On Yasuo, 100% of the time when the Yasuo subreddit is using windwall reactively to block a spell or an ability, there is a lag time between casting and blocking.
Therefore, it is possible to be hooked by thresh, blitz, etc. and still have your windwall go up.
The lag time between casting and blocking is ~0.1 - 0.25 Seconds. Easily repeatable. Will provide video after league stops memory crashing during replays.
Here is a video of it on twitch: https://clips.twitch.tv/PiercingPrettyStinkbugSeemsGood