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.
Caps lock master race, reporting in. It's amazing how well-suited Caps lock is to act as the Ctrl key. Go through the pain of remapping for a day, feel great using your new, anatomic Ctrl for the rest of your life.
Seriously, do it now. In two days, you'll thank me.
Inspired by the Search key in ChromeOS, I've been mapping Caps-A to "Quick Open File…" and Caps-S to "Command Palette…" in Sublime for years. It's wickedly convenient.
I agree with you that it's easier to reach, but it's harder to find the ctrl key by feel. That being said, I haven't swapped the keys in my bios, and I've gotten used to this layout...
This is how I also use the control key, using the bone in my hand right where the pinky attaches to the hand. When ctrl is in the very corner, it's easy to press. When it's to the right of the fn (like on the apple keyboard I am currently using), it is significantly harder.
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.