Nexus 7: Lag?

Ever since I upgraded to 4.2.1, there has been a very noticeable lag when multitasking between applications. This happens especially when I open 3 or 4 apps and have them running in the background. Know I know that these apps are still taking resources up, but when I was on 4.1.2, this was not a problem that had occurred.

So has anyone else experienced these issues/lag/annoyance?

Love the device, just wondering if its just me?