Have you actually ever used an ORM? All of your posts strike me as being of an "I imagine it would be bad" nature, without actually speaking from experience.
I get the impression that you don't really understand the complexity and capabilities of a modern, robust ORM, or how it can be used.
And you're working on a data warehouse, which isn't usually a viable candidate for ORM in the first place.
I've used ORMs before i worked at myspace. NHibernate specifically. I've also used sql alchemy on the python side. NHibernate was in a professional environment, sql alchemy was a bunch of stuff I did for evaluation purposes, so you can discount that if you like.
And i'm not working at a data warehouse.. why do you think that?
I get the impression that you don't really understand the complexity and capabilities of a modern, robust ORM, or how it can be used.
And you're working on a data warehouse, which isn't usually a viable candidate for ORM in the first place.