Huh? What is the writer taking about? He never does suggest why a Mac user would need to reference an IP address more often. (For that matter, many networks run DHCP, so who cares what the IP addresss is of the machine).
That, and the business about dumping the ipconfig file in Vista. Now that's what I'd call user hostile!
The writer obviously hasn't worked in IT or done any networking himself. Based on his statement he has no business writing an article on anything to do with computers, unless he's writing a simple guide on how to power on a PC and get on AOL.