i don't agree completely with this.
1) yes, it is a finite amount of time. but neurosurgery is 7 years; ortho, ENT, plastics, ophtho are all less. CT is the same.
2) it applies, but not always followed. i've visited many different programs where as a medical student, working side by side with the residents, we easily surpassed 100 hrs a week. the "random" surveys they give out to ensure compliance is largely bs-ed to coverup the infractions, or during night-float where its possible to comply.
3) ortho is tough too; at the highest volume centers, it can be as tough as, or possibly, longer than neurosurgery. in the vast majority of places i've seen, ortho is not quite as demanding as neuro. this may also be because neurosurg attendings are notoriously exacting, big-headed, and erratic in their behavior, whereas ortho attendings, though also exacting, are generally more sane. it's a tough call to make.
my experience iwth CT is limited, so i can't divulge much as to that.
in a word, yes, neuro is one of the hardest, and, at many hospitals, the hardest. however, general surgery, ortho, etc. are also very difficult. if you can do gen surg or ortho, i think you are perfectly capable of working a little harder in a neurosurgical residency.