RJ,
If Ron Whitten or Brad Klein waited until they had played a new course six times in all weather conditions to write an article about a new course, it would be old news. Deadlines and budgets mean by necessity that they must review a course, giving general impressions based on one visit, although I know Ron has visited courses under construction before playing them. While I am sure the magazine wants good independent reviews and critical thinking, they will not accept a review of a three year old course, as they will have been scooped.
Short version is that they are charged with coming up with an interesting review that sells magazines, not an in depth architectural review. You are surmising the wrong reasons and criteria in evaluating such a review.
Now, your point about the top 100 rankings is probably a little more valid. But how many raters, who presumably have real lives, too, can devote weeks to the study of one course?
And for that matter, I suspect that playing SH once would clearly put it in anyones top 10 on overall ambiance and style. I think for most courses you kind of slot it in a group of ten, hundred, or thousand by first and overall impressions. Multiple playings would probably affect your order within that group, but then again, most people just don't care whether a course is 33rd or 34th in one raters view, and these things are averaged.
Shorter version (and I hate to sound snotty about this, so take it in good humor) - Excruciatingly accurate golf course rankings are not that important in the overall scheme of things. We can all hope things go great enough in the future that golf rankings would be this country's biggest problem, but I don't think its gonna happen.