Lots of schools of thought on this, comes down to what you think is best.
My thoughts - 600 miles is nothing, it's pointless, the car has been run on the bench/production line/storage compounds/delivery etc etc for many hours already.
So, as soon as the oil was hot, I battered it and have continued to do so since. It had less than 600 miles on it when it did its first track day at Snetterton. Has just over 2k on it now and is already feeling much better, uses no oil and is returning unusually high MPG considering what it is.
People talk about these engines really loosening up around 20k - I'm not waiting that long!!
Mechanical sympathy is a must, ensure everything is up to operating temps before you give it billy balls. There's no harm in thrashing it, but there's also no point in causing undue damage by being careless.