This is true. Running on dry track conditions, a tire with a tread pattern like an RA-1 will typically last longer when shaved, and it will offer more consistent grip over its lifetime. Because the tread pattern has a lot of void compared to more modern competition tires, it has more tread squirm at full tread, and this squirm not only contributes to more unpredictable handling from the car, but it also greatly increases the tire's temperature.
Heat cycling is another good recommendation for competition tires. This involves bringing the tires up to a uniform temperature of about 150 degrees, then letting them cool and rest for approximately 48 hours. This allows the molecular bonds in the rubber to be broken and reformed, and it also promotes longer tire life and more consistent grip over the lifespan of the tire.
Todd Eady's Discount Tire in Carrolton offers both heat cycling and tread shaving on site, iirc.
In my experience, it is typically newbies that overheat tires more than anyone, because they tend to overdrive the car more. :wink: