Probably true, because 80-90% of people wouldn't finish their residency/fellowship until they are 38 or so. Great way to solve the job shortage problem by reducing supplies.
I went into gen surg because I thought it was the best of all possible worlds-- you got to be a diagnostician and an interventionalist. Well, the interventionalist half is certainly true but it wasn't as alluring as I thought. You can't know that as a med student because all you're drooling over as a student is the chance to do something, anything, in the OR or in the ER.