This would be a great starting point...... for someone who has never held a barbell before and wants to bring a tape measure to the gym.... LOL
The fu<king guys a T-nation crack me up.... there's some decent stuff on there - Dave Tate writes pretty good stuff even if he makes himself out to be this hardcore badass from hell.... lol.....
But seriously, look at how much the author benches. Look at what contests they've won.
In the end of the day you want to be wide enough so that your wrists are never inside of your elbows. Anywhere between that point and the widest legal grip you can use is fair game.
The guys who get hung up on this stuff never do much in the real world. Your time would be better spent working on how to blow your belly out more, tucking your shoulders back more, and getting a big arch..... None of thos things come naturally but all can be improved if you work on them. That's much more worthwhile to worry about.