For our class (modern modified) the target times were adjusted (reduced) after a couple of days of competition, presumably based on prior days results. I think all target times were reduced somewhat, but the most significant reductions were for modern modified.
The consensus among competitors at the event seemed to be that the ideal car was a 70s shell prepared to modified rules with updated mechanicals. That is exactly what Bill Arnold did with his 72 Bavaria. The difference in target times for his class (Classic) vs ours (Modern) were quite significant. Whether intentional or not, the target times seem to favor cars that look old over cars that look new while simultaneously favoring significantly modified mechanicals over stock mechanicals. I didn't read the prep rules too closely, but there seems to be quite a bit of leeway in modified. I think we could have put our suspension and motor in a 76 Mustang and zeroed a lot more stages. Unfortunately, Sean is not in the business of tuning classic Mustangs, so it is unlikely he will be backing such an effort.
Shameless plug: I'm available to co-drive next year