Let me tell you - I am meticulous when it comes to cleaning my MLs. And after my session today with the V2 and BH209, it still took me the same amount of time to clean my rifle. I used a minimum of 20 patches until they started coming out clean.
I did find that Hoppes Elite (Copper, lead, carbon remover) works really well. But after seveal patches with it and having them come out fairly clean I used Montana Xtreme Cowboy blend and that got quite a bit more fouling out.
I do honestly believe that BH209 makes for easier loading without swabbing between shots. But honestly I see no difference in the amount of time for cleaning.