I have both Nexus 7 and Nexus 4, running two different ROM'S and have to say I have never noticed any slow down or anything.
I play games, media and do a lot of web browsing on both and have absolutely no problems!
Shame your having such problems mate
If those specs are true that looks very interesting although I think I will upgrade to the new Nexus 10 if there is one before getting the new 7!
I know Dude, it started off such a great experience and I can't pinpoint how or when but it went sour within the the last few months. So much so that I even contemplated buying an ipad mini (and I loath Apple)

I've only just stumbled into the thread so I've not read everything about where you're experiencing the slowdown but have you tried https://play.google.com/store/apps/details?id=com.grilledmonkey.lagfix&hl=en to see if the slowdown relates to a TRIM issue?
Thanks Mate but the app needs root permission and I'm not rooted unfortunately. I was but then reverted back to stock. Most of the lag is generally using different apps and switching between them and going back to the home screen. Chrome is virtually unusable and I'm using Boat browser as it manages to run ok. I've used most (if not all) the apps which are supposed to reduce the lag without root and they work for a week or so but then the Nexus 7 reverts back to type A - major lagfest.

Have to say that my N7 is awful, has loads of free space (>50% if not more) and sometimes it lags worse than online gaming with 56k, I try to keep it clean of junk and end up resetting it every few months just to sort it out.
I know what you're going through Mate, I'm experiencing the same issues
