I think this is something that is being omitted in a lot of the speculation around here. She says she was raped in the bathroom and other students who were at the party said that 3 guys did in fact follow her in to the bathroom, although they also said they didn't know what happened in there. So apparently she and 3 guys did fit into the bathroom.
Do you have a source for that?
To my knowledge, none of the students have made any statements at all.