Floor leveling in new dev

Is this a quality development? Sound fishy. I am buying in a Greenwich Village new development in a pre-war building, and they are leveling the concrete before putting down the subfloor. What developments are you speaking about?

for example 8-10 warren st, 60 beach st. These are supposed to be quality conversions .. at least judging by the price

I was told that those apartments were built specifically for people with one leg longer than the other. Prevents those folks from constantly walking in circles and never being able to leave the apartment.

The goal for a developer is to get a flat floor, which doesn't mean it has to be level.

In fact many of the old buildings floors are more level than the ones today (Builders, not developers, are that cheap!).

Personally level is inconsequential (As it has to be within a certain ratio by code), flat is a far greater issue. If the floor isn't problems telescope up - wood flooring will have issues et al..