So what you are basically saying is that all of a sudden since 1.05, all human players have suddenly become bad in the wet and the speed being shown by the AI is a deliberate intention of the developers.
These same humans have all been competitive against the wet AI for 6 versions of the game and then suddenly are falling 1.2 seconds behind........or just or, the game could be buggy.
As for the wet weather setup, how do you explain the loss of speed of human players in a wet weather transition. The AI like the player, are using the setup they started the race with but only the human loses major speed once it gets wet