I think the best thing that Bonty's article does is show that KOPS isn't the gospel truth that many believe it to be. It's not a one size fits all solution to positioning your saddle fore/aft. But, it's a great place to start and adjust from. From my experience, though, any rule of thumb in bike fit has the potential to, when applied, work against the rider. That's why they're rules of thumb, though.

I wish Bontrager's article still had the equations to determing CG, etc. I'd like to see how different my position would be in relation to KOPS, if at all. Either way, his article does bring up some very good points about weight balance on the bike if nothing else.