engine on coasting, a question

[GasSavers_Ryland]

I was wondering about engine on coasting on the civic vx, or any other car that has "lean burn" mode, lean burn kicks in when it's in gear, above idle, clutch engaged, right? so in theory it would use more gas to coast with the clutch in, and the engine idleing, then it would with the car "pulling" the engine alone, right?
I was doing a little bit of foot off gas coasting on the highway today and it was incredibly smooth, you could feel just the slightest drag disapear if you pushed the clutch in, but it was hardly noticable.