Seeing as the 2013 MacBook Air had 2X as fast an SSD as the 2012 model, which in turn was 2X faster than the 2011 model and he 2011 model feels super snappy, yeah I think you're ok.

Hopefully you'll benefit from a better build. My 2013 MacBook Air has a nasty issue where trackpad doesn't work properly if the machine is tilted even 15 degrees. The adapter has failed once already and the second one stopped charging last week.

Whatever you do, get the 3 year care is all I can say.

According to the replies above, you can run benchmark by yourself, maybe some Macbook Air still have fast SSDs.