Yes, that statement is often contrary to what people believe.
  They often point to the high end Porsche as an example.  Ever
priced a porsche brake rotor?   Drilled/slotted rotors work great
on a race car.  But they beat the crap out of their brakes, and
use rotors that cost hundreds of dollars each.   They also
replace the rotors after one race week end (or less).
   Brakes work by converting rotational energy into heat energy.
 More contact area = more heat, which means the brakes work
better.  Holes and slots will decrease surface area, and braking
efficiency.  You can use drilled rotors if you really think you
need that much brake cooling.  But you'll need to increase the
size of the rotor to compensate.  It's cheaper, easier, and
lighter to add cooling ducts.
   Go to the Bear Brakes and Willwood Brakes web site.  Go read
the FAQ page, and see what the pros say.

It worked for me so I know the site is still up and running.

    I run my Cobra on the road course pretty regularly.   I beat
the crap out of the brakes lap after lap.   I use stock Ford SVO
calipers in the front, and stock Ford T-Bird calipers in the
rear.   The rotors  are solid stock replacement.  On the street I
use Hawk HP+ pads front and rear.  I got it all from
www.discbrakesrus.com.

    This is an excellent performing brake system.  Hot or cold,
braking is excellent, quiet, and consistant.

   For your car I would go to Autozone or NAPA and get a stock
replacement, or contact discbrakesrus and have them delivered.