I just found this fantastic video on
Screwattack.com.
"Aliens are higher on the food chain than the Colonial Marines, and Gearbox wants you to remember that."
http://www.screwattack.com/shows/originals/random-awesomeness/aliens-are-higher-food-chain-colonial-marines-and-gearbox-wants-yIt seems that xenomorphs have the same durability as in Aliens. They cannot take a whole lot of firepower, but they can also kill marines in 1 or 2 hits.
This seems pretty accurate.
Also NPC characters seem to really have a relationship with each marine, and when one dies it will effect the whole group. Interesting. They can also do things like weild doors if you don't want to so they can do some things by themselves.
Also this may be old news but Moosh89's battle to get female marines in multiplayer gets addressed! The interviewer asks Colonial Marines' Senior Producer Brian Burleson about the fan outrage earlier this year about the lack of female marines in multiplayer and what Gearbox is going to do to drive the genre forward in that regard. Basically it is 100% stated that there will be playable female marines in multiplayer and you can customize them! Brian says that you cannot have an Alien game without women. Women are an important part of the Alien series, Ripley is the main character and Vasquez is awesome. He also says that they have an obligation to listen to the fans.
Cool stuff and a neat interview overall. I have never heard of Brian Burleson before but he seems to be really sincere with his answers and doesn't dodge questions. I like this guy.