The link you posted has been updated with a new, better root according to XDA. The new one is HERE.
Frankly, I don't recommend people root unless they are really experienced at this sort of thing. Especially until some really good custom ROMs become available that make it worth it. One of the major selling points of the Moto X are the software customizations that come with the device out of the box, so unless there's a real benefit from a ROM I won't even bother. Not to mention there's always the small risk of bricking your device if you don't know what you're doing.