I rotated at G'town this summer, and they have changed their trauma exposure significantly as of lately.
I rotated for 2 weeks at the Washington Hospital Center, and while there as a student, you are doing trauma with Dr. Debritz, and elective cases as well with numerous other attendings. But the nice thing is, both GW and G'town residents and attendings are on faculty at WHC, and you as a student are able to work with both schools equally even though you are "technically" a G'town extern. The GW and G'town residents also flip-flop between the two schools attendings, so they get a nice experience of two different universities.
I was happy with the three GW residents that I worked with during the two weeks. They did not seem "behind the power curve" at all; they had equal knowledge base and OR skills comparable to the G'town guys. But then again, it was only 3 of the entire residency program, so I don't know if they were the super stars of the program or rather the norm.
As far as trauma is concerned, The G'town residents are going to Fairfax now, which is VERY trauma heavy. So now the residents are getting an adequate exposure to trauma. But you are right; before this new rotation, G'town was extremely white collar. They GUH is private, and you see hardly any trauma. The only trauma you'll experience are closed fractures for the most part. Lots of joints, sports, elective type cases.
Hope this helps. Let me know if you have any more questions.