Mac OS 10.4.7 update bonus: two-finger right click

A nice little bonus arrive with yesterday's release of Mac 10.4.7: two-finger right clicking for 15-inch MacBook Pro owners. Originally reported at TUAW Apple's 113MB update for OS X included this nice little feature for MacBook Pro users that previously had to install a hack to get the functionality.
Two-finger secondary click, as Apple calls it, is ideal for users of Parallels Desktop virtualization software when using flavors of Windows and Apple's Boot Camp because it enables you to emulate a second (right) mouse button - essential in Windows. 

The feature is built-into MacBooks (non-pro) and the 17-inch MacBook Pro but 15-inch MacBook Pro users have been left out in the cold, until yesterday.
Anyone else find it odd that Apple doesn't mention this highly-requested feature anywhere in the 10.4.7 update notes?