Many Martins - very likely the majority - come from the factory with the nut slots cut too high. You'd be amazed at the difference if you have a good luthier do a setup. If other guitars don't hurt your fingers, but this does, you should definitely have it done.

If you have bone nut and saddle put in while he's doing it, you can make it even more powerful - if you want to.

If the thing was new from the dealer, you should make a determined effort to find the paperwork and send it in, at least if you're in the US. You want that lifetime warranty.

Other thing for me at least is that I used dread Martins in the hands of learners near to me in jams since they would drown me out with bad playing. Now I have to learn to play lightly all the time so as not to be a pain in the neck for others at jams.

For heaven's sake, why? Sweet revenge! (If you have to force yourself to play lightly with a Martin, don't ever get a Collings!)

Peter.