Yea I think the wiki is wrong if they say it's 10%
I think they've started crying after one hit everytime for me. I do believe though that I sometimes had more time between first cry and the plunge. But I'm not sure, I haven't harvested enough barnacles to say for sure (you only need so many)
Unrelated but I cease the occasion to brag about this one
https://steamcommunity.com/sharedfiles/filedetails/?id=2622476737