Yup going to crap on them. Good looking at the dealership and on the street, change them for the track.
If you have an endless racing budget and are looking for every 100 th of a second they have a place. If your a weekend racer on a budget looking for performance and longevity not the ticket.
The Porsches I run with at the home track have found the same thing. Cross drilled rotors do not last as long at the track as the alternatives and the gains versus cost do not justify the expense. Essex has some good information on this subject I suggest any one interested take a look, they do a much better job of explaining it than I can.
We are talking individuals that run upwards of a dozen track days with NASA, SCCA or the like. Where average consumable costs are are several thousand dollars a year. SO yeah longevity and reliability of components counts.
Not entirely true at all. You gonna crap on the Porsches that have it stock? Or other cars with factory carbon rotors that are drilled? No you won't.
They have a legitimate purpose and are acceptable on a track car with proper inspection and maintenance.
They add bite with more leading edges to grab on to. On a slotted rotor they keep the pad face clean. Then there are as you mentioned dimples too. Not better or worse in most street applications.