Isnt the aircraft still bound by their respective CAT speed?
Interesting question again. Lets check the 737.
[737-700/800]
The airplane is classified as a Medium Type Category.
The airplane is certified as Approach Category "C".
Thats what out manual says, however for the -800 Vref for flaps 30 is quite often higher than 140kts, even flaps 40 can be close to or over 140kts. It is still category C...