Menzinger
Kessel4LadyByng
Those minutes also have to do with less penalties the past couple of games so more 5 on 5 ice time available. It may have looked closer to this the first 5 games as well if there were not so many penalties. It may be a bit misleading, but definitely they are sheltered.
Likely has something to do with it, but a 7 minute spread between their line and Kadri/Matthews lines is also pretty telling. That's a pretty sizeable gap