Hang on a minute here, guys - let's get a bit of perspective and accuracy into this discussion. The article was a page and a half long and was primarily describing a system developed by Ron Brown (A Simple Two Queen System, Northern Books, 1980). This uses a "Two Queen Board" to initially separate the queens and their respective broods.
Toward the end of the piece under the heading "Other multiple queen colony methods have also been developed" the writer devotes three sentences to the the "clipped mandible" method, referenced to "Maintenance and application of multiple queen colonies in commercial beekeeping", Journal of Apicultural Research, 2009. He goes on the write "You may not wish to clip queens' mandibles (I know I do not) but Ron Brown's system is easy to follow and sounds like a lot of fun. It can provide a rapid build-up at times of need, giving benefits over single queen colonies (see summary box). Why not try it next season and let us know how you get on." He seems to have included the three sentences about clipped mandibles for the sake of completeness, to show that he has read around the subject.
That does not look to me like he is advocating clipped mandibles (quite the opposite) but rather that he is suggesting that beekeepers try Ron Brown's two queen system for developing a large foraging force before the main flow.
CVB