I worked in the Mid-Atlantic region for about ten years and I think much of what I saw in terms of team leaders can be classified into two types ; Those who really bust their butts, work hard and actually go out on the sales floor. These team leaders work themselves to the point of exhaustion, sacrifice personal time and also work off the clock for hours at a time. They are at least in some sense part of the team. Generally though they end up burning out from the sheer amount of work and lack of support from STL'S and ASTL'S. They on average don't last long.
The other; sits in the office all day, and rarely ventures out to the sales floor. They are great at verbalizing departmental goals and accomplishments to store leadership but usually have limited understanding of the products , poor departmental leadership, and lack luster customer service skills. This team leader works only their scheduled hours and certainly does not help out with the manual labor. The only reason why this person continues to have a job is because they are in some way protected by friend or family member higher up in the company. They might have some sort of connection to the current STL or an STL in another store and therefore are untouchable. This team leader will hire and promote their friends leaving the real work to everyone else on the department.