I might have spoken too soon. Overall definitely my N7(2012) Wifi is more responsive in 5.1.1 versus 5.1, but it will slow to a crawl again when using Chrome Browser (after opening and closing a few tabs) and when I think background processes are busy. I find that I need to reboot the device every so often (like once a day will be best)
I am thinking of getting the N7(2013) from Amazon before they are all sold out. I love the 7inch format, and I love the stock android experience. I will then use the N7(2012) for simpler tasks like serving as a remote for my audio system, reduce the number of installed apps, and it should be snappy.
Your is the wifi version right? My 5.1 is working smoothly already leh, wah if 5.1.1 is even better i can only drool. Do you experience better battery life over 5.1? Cos mine is terrible on 5.1 when connected to wifi.