In Autocross we cool down tires with water... it does take quite a bit of time for the tires to cool down....
Once my Azenis overheat (Azenis RT615s hate heat), It IS like driving on ICE. Overdriving the tires will heat them up VERY VERY quickly!
just my real life experience, take it for whatever its worth to you I guess.... I'm personally happy with the way heat is handled in the patch....