Having read the post's so far it would seem the only fact is there are very few facts about which is safer, however what I would like to know is why with an R22 on a private flight or out with an instructor you can land in tiny little sites such as clearings in woods or private sites.But with fare paying passengers and you would hope an experienced pilot you can't it not like you hear of loads of accidents involving such flights.[they normally roll over before they get of the ground]
I am not suggesting letting singles land in site's in the middle of towns with no safe place to go should the engine stop but giving a heli 400m's plus as a takeoff run when doing public transport seems daft.