exactly - I think that lifting your fingers is the 'normal' way to type on a traditional keyboard with raised keys. But, I love that when I type on my low-profile keyboard I feel like my fingers are always in contact with the keyboard and just kind of slide over the tops of the keys to hit their target.
On the occasion when I have to use a raised key keyboard, I have to re-remember how to lift my fingers to type. It takes me a minute to adjust before my fingers stop getting caught on all the key corners. Then again, it could just be personal style - anyways, while I am a pretty fast typist, I wouldn't say that I have the most pristine home row technique, so take my comments with a grain of salt.