Fyi, I ended up buying a refurbished 2012 11.6" MBA through the apple site and typing on it while sitting at a desk versus standing up hunched over the table at Best Buy or the apple store is completely different. I think it's a question of ergonomics. When I was typing on the 11" MBA at the store, my hand hit the edge of the palm rest and it was very uncomfortable. I didn't even like the keyboard and found it hard to type on without errors. Now that I have a MBA, from the first key, it has been fine. In fact, I love it (surprisingly). The edge (at least on this one) is not sharp and my hands are fine on or over the palm rest. Also, re: the screen size, it's very different out of the store. I think it's fine (for me), but in the store, it looked so small compared to the 13's, the 15's, the iMacs.
Those on the fence about the 11" MBA might want to actually test it in the environment where you'll be using it. I'm not 100% sure I'll be keeping it, but I have to say I was surprised how much I like the keyboard and typing experience (although I'd like it if the screen reclined back another few degrees...).