I'm a fast touch typist. I have an old MBA and the keyboard is fine, can't complain given the constraints.
I tried the new MBA keyboard in Best Buy yesterday. Holy moly that thing is very, very bad. One of the worst I've used in my life. The keys are too big? And the way they hit at the bottom of travel 8 knuckles hurt? I've never had that happen before. DO NOT WANT.
Come from the same basic boat. Touch Typists. Decently fast. I have a 2011 MBA and the keyboard was simply the best mobile keyboard I've ever used.
Had to roll out a few MacBook Pro's to users over the last couple years (though very very few and far between). I got the chance to use them for a few days extensively.
I DESPISE THE NEW KEYBOARD. some/ many might be perfectly fine with it. But Apple absolutely dowgraded the quality of the typing experience from their old keyboards in the name of 1mm