To be fair, my Nexus 7 hasn't quite given up the ghost yet, but now that its successor has been released, I'm counting the days until it too becomes as responsive as Karen Ann Quinlan.
And that's a shame because Android's interface has really come a long way in that time. Paul Stamatiou's article showcases some really cool design advances that have happened since Android 4.0.
For me it all comes down to Google seeming to not care one bit about anything except the latest and greatest devices. Yes I know that Android 4.3 is supposed to address that - good luck shipping that one out to all the major carriers.
In closing, the same brickification that hit my Galaxy Nexus this year happened to my original droid in 2011 - fool me once shame on you, fool me twice...