There is a special place in hell reserved for the designer who swapped the function and control key placement on that keyboard. Thankfully you can change it in the bios.
You say swapped, I say its the correct placement. I use control much more frequently than fn, and its easier to reach it with my pinky on the thinkpad keyboard.
I had a temporary job transcribing videotaped meetings to text and I used ctrl a lot for controlling the video. That fn placement almost killed my left hand, would have been perfectly fine if they were switched but that alone greatly limited my freedom of movement as I really wanted to borrow a sane keyboard wherever I went.
edit: I guess it must depend on the size of the keyboard. On the x-series it was unforgivable.