Brad, I think you have defined the problem...people photos and landscape photos are VERY different...I think landscape photos have more textural subtleties...harsher light & shadow...a wider range of tonal differences.

Unless you are taking pictures of lizard-like aliens, or those wonderful Ents, people tend to be texturally smooth with more gradient changes in tones.

I guess I would have to say that people tones may be much easier to achieve through a lab...especially now, when many people are requesting B&W photos for weddings, etc.

It's just two different modalities! I rarely photograph people, so when I do & I make enlargements of it, I have to really think about how it's supposed to look.