Mine is an X230, really disappointed with the nub. I'm getting sentimental here, remembering my old IBM Thinkpad. I just wish a manufacturer realizes there's a market for trackpoints and releases a well-built trackpoint only model. I'm not gonna hold my breath though. I heard the X240 is even worse, which is a pity because I almost got it since it came with an SSD... but I'm not a big fan of soft-key buttons.
The other benefit of nubs was that not having a huge touch pad at the bottom of the laptop let them bring the keyboard much closer to the edge, where (like a regular keyboard) it is much more comfortable to type on. Since modern Thinkpads include the touchpad anyway, you have no choice but to hurt your wrists constantly for the sake of a device that (if you're like me) you completely disabled in the BIOS because it just got in the way.