Bilal, Lamborghini is owned by Audi (VW) and they did practically the same testing on the Gallardo as they did with all their other models. The Murcielago was a different story as far as I remember, the project has been started by Lamborghini and has been "overworked" when Audi took them over. I read somewhere that an Audi engineer was shocked of the bad development when they got the project to finish it.
It seems that they did a great job, the Murcielago is a stunning sports car.
Can't say much about Ferrari but I suppose they do the same testing as Fiat does which doesn't comfort me too much. But Ferrari quality has improved substantially since LM is the boss, so I guess they do it right.