Here's an interesting snippet:
"Josh explained that me seeing Damage Threshold only on the leather armor, but Damage Resistance on the Vault 21 jumpsuit was a bug – DR is actually gone entirely from the game in its current build and DT is the only damage-reducing armor stat now. However, at least on the PC, those who want for the armor to be more like in Fallout 3, with DR only, or like Fallout 1 and 2, with both DR and DT, will be able to adjust it accordingly in the GECK, as both stats are supported by the editor. I also noticed that in the inventory the Damage field for weapons now alternates between damage per shot and damage per second. By the way, damage is now a range, like in Fallout 1 and 2, instead of a set number like in Fallout 3. "
Also, http://fallout.wikia.com/wiki/User_blog:Ausir/My_Fallout:_New_Vegas_preview_-_part_1 to the first part. (Warning : those are a bit more spoiler-y) (second warning : yeah, I do know they've probably been already posted, but I think it's helpful to put both links in the same thread)
I hope I haven't overlooked someone else posting this.
