I would agree that PC users are forgetting these are 360 graphics. Although, the comparison shots in the poll may be vanilla Oblivion, it has bloom, HDR, and maxed graphics. Mods wouldn't have made it that much better.
O rly... Oblivion with quarls textures and OBGE v2:
http://imageshack.us/photo/my-images/802/obskycomp2.png/
Here some more. These ones aren't mine but this is were I found the list of mods I intsalled in the above picture..(these are really good looking shots. better than my own above^^)
http://www.gametrailers.com/users/chrissx2/gamepad/?action=viewblog&id=543244
http://www.gametrailers.com/users/chrissx2/gamepad/?action=viewblog&id=544409
http://www.gametrailers.com/users/chrissx2/gamepad/?action=viewblog&id=546543