In my own experience, downforce cars loose it just like regular cars. Sometimes it is a slow oversteer that can be corrected (or not) and other times it just snaps. It really all depends on the corner, where you are in it, and what you are doing in it. There is no one answer. The cars have more grip to take advantage of but obviously there is a limit, just like with all other cars.
For me, the biggest thing to get used to was the braking. Smashing them down as hard as you can in high-speed entries and having to significantly taper off as the downforce diminishes.
For me, the biggest thing to get used to was the braking. Smashing them down as hard as you can in high-speed entries and having to significantly taper off as the downforce diminishes.