Yup, I've heard similar things. For our school, the people who took Kaplan were either (1) rich or (2) doubtful of their own abilities and wanted a "high-yield, teach-me-what-I-need-to-know" course.
BTW, I only say "rich" because the nearest Kaplan site with live lectures was in LA...so that's at least a $300 plane ticket, plus you need housing, transportation, etc.