Hoping to get your inputs on the following.
I just read an article titled Successful Small Team Leadership: Manage the Group, Not the Individual (knowledge.wpcarey.asu.edu/article.cfm). Following is a quote from the article
"Most managers believe that you should treat everybody differently," Kinicki says. "But our results reveal that, while that approach may seem to make sense, you should realize that, in a team setting, it can actually lead to negative effects. That's our most important finding -- that there are real negative consequences when you adopt an individual-focused style of differentiated leadership."
It's based on a study which concludes that "differentiated" or "individual-focused" leadership is actually "less effective" and "downright damaging in team settings", compared to "group-focused" leadership.
I find that this conclusion may run counter to the spirit of one-on-ones and using the behavioral profiles of directs in managing them.