we didnt use it in 2009 dude... and we did introduce it, but i guarantee with Jenkins, Jolly, Pickett, and Raji. We had very few 2 man fronts in 2009...
They used it a lot in 2009 go watch any highlight video or game from that season. The reason they used it wasn't because they had great pass rushers on the defensive line (Jolly/Pickett/Raji were crap pass rushers in 09 only Jenkins was good). The reason they used the Nickel so much was so Charles Woodson could play slot CB.