Quoted in the UK’s Racing Post after Royal Ascot, Rob Waterhouse says “Australian sprinters are so outstandingly good because of the environment in which they develop. Australia's climate is conducive to the production of sprinters. Across the Tasman, in the cooler climes of New Zealand, development is slower, hence that country’s high reputation as a producer of stayers.”Arion Pedigrees provided B&R with all the stakes races run in Australia and New Zealand from 1 August 2009 to 24 September 2011. This amounts to 922 individual winners of 1501 races. With a base established, the Arion data was sent to the Australian Stud Book who provided the place of birth of all 922 winners.
You can read the article here.