[JAMF]

Meh... it only has influence on a small portion of the network, so as soon as the signal is out of your house and onto the ISP's network, there's no improvement to be had there.

You can check where your ping will see improvements. This is the tool BigFoot uses themselves:
http://freewareapp.com/lagmeter_download/

Reviews of the previous versions of Killer NICs:
http://www.anandtech.com/showdoc.aspx?i=2865
http://gear.ign.com/articles/729/729557p1.html
http://enthusiast.hardocp.com/article.h ... VzaWFzdA==