After a few days you will get used to it. I absolutely love the keyboard. I type 120wpm and come from using an ergonomic (Kinesis Advantage) keyboard with my desktop computer. Very different typing experiences but I must say I really enjoy the typing experience on the rMB.
I have exactly same setup (without the 120wpm) and I agree: the rMB and the Advantage are very different, but both are excellent to type on.