And fir every piccie you post of a car without drilled discs I can post one with, so its a pointless exercise really. both are used, both have there benefits and drawbacks.
http://www.maserati-alfieri.co.uk/al...cgrath-13a.jpg
http://www.spidertrax.com/brakes_cdr1.jpg
and a picture of a Lambo for good measure although you cant see the brakes.
http://www.sampogrupp.ee/Lamborghini_Premium_950_1.jpg