"Apple Inc.'s CFO yesterday said Windows Vista is no threat to Mac OS X 10.5 "Leopard" and argued that the steep hardware requirements of Microsoft's new operating system will give Leopard an opportunity to step in and grab more market share."

Oppenheimer is later quoted with the following comments:

"We believe we have the superior OS on the market today, and [this] release will only extend that. With the features and functionally and stability and security of Mac OS X, I don't really see Vista as a threat."

"Since the hardware requirements for Vista require much of the installed base to buy a new PC, it gives [the] Mac an opportunity to be considered"

You can read the article at Computerworld.