That is very interesting. Did you only test the new iPhone 11 flagship series? Because on my iPhone X, I don't have any qualitative data to back this up, but it looks like my phone now charges faster wirelessly. In settings, under battery, when charging, the gradient of the change in battery charged looks more steep than before this version of iOS. Also, it just feels like it charges faster, like when I place it down to charge for a shorter time, like half an hour, there seems to be more power added to it than what I normally get. However, this could maybe be a different change. Maybe the phone charges wirelessly more efficiently and hence less heat and throttling of the charging speed? I have no idea, but it seems faster for me on iPhone X on the new iOS versions.