The speed, processing power, of the computer used to crack a password doesn't make any difference. The process is not CPU dependent and is simply the input of a simple list of logical guesses. As mentioned in the article the main limitation is the speed with guesses can be made. The two main limitations are the speed of the connection and any limitation placed on how many attempts can be made in any set amount of time by the securing system. The basics are as relevant now as they were in 2007.
This is true for online password attacks, and not true for offline password attacks. Many systems are vulnerable to offline password attacks.