Well, Ok mate.
Granted, I don't think the "average" US Marine is an "Official" elite force... unless you compare them to just about any other force that does the same job from any other country.
But let's get back to the subject at hand...
I have read many books on the subject, have served in the military, and come from a long, distinguished line of soldiers. I understand the difference between "Official" SPECOPS units as opposed to unofficial ones, and know their names as well.
But I think we all realise there is much more to an unconventional warfare unit than a name or designation. It's about tactics and employment of a particular unit, not what you call them or some other identifier, like a badge or beret.
What makes them any less special for you? It's not enough to be inserted by a DAP Pave Hawk behind enemy lines, at O-dark-thirty hours, to crawl like a snake across kilometers of open ground, to silently kill a trooper with a garrote or K-bar, to kill a specific target with a single well placed shot, and go through all of the above- AGAIN- while evading a now alert enemy intent on catching you, interogating you, and finally killing you in a very painful manner, because you are too dangerous to ever release back to the enemy. Does this sound like something just any soldier can do? I'll tell you something else, in "Official" elite units such as the ones you mentioned above, only their best candidates are selected for either medic, or, you guessed it- SNIPERS. That's because it takes a special kind of man to do the job.
I don't know what you do in the service, or if you ever served, but if you did anything like what I've described, then I'd have to say that was fairly special.