Using the Silica wireless hacking tool sold by penetration-testing software provider Immunity for $2,500 a year, I had no trouble capturing a handshake established between a Netgear WGR617 wireless router and my MacBook Pro.
Using the aircrack-ng suite you can do it for free.
That's exactly what this article points out in the very next sentence after the section I quoted.
Read the article, or view it and press CTRL-F and type $2,500.