Perhaps a bit more telling is this bit from a post last month, when the team started looking for 3D artists:
Or perhaps this bit from the 3D Environment Concept Artist job description:
Work with a small team on a puzzle-exploration game that is philosophical, and quiet, and is being made for reasons other than crass profit motive. Run by the designer/programmer of the critically-acclaimed game Braid, the team is fully-funded and pay is high.
I can only assume that's because the team already has a "Girls With Big Tits" expert on staff.
The majority of the portfolio should consist of things absent from the following list: Girls With Big Tits; Barbarians Wielding Axes, Covered in Blood; Aliens; Space Ships; Gangsters Getting Shot in the Face; Orcs; Giant Robots; and, of course, Postapocalyptic Wastelands.
The Witness is currently planned for release on multiple platforms in late 2011.