I wont detail specifics but I took longer than normal to attain my BS and I'm not shy about it on my resume. In all my interviews it came up once as an afterthought "Oh, why'd this take so long?" and a quick story was satisfactory.

No one will make a big deal out of it like you do. As others have said, try listing only your graduation date. If you think it will come up anyway, have a one sentence blurb prepared that seems reasonable.

Unless you're doing something like investment banking or consulting where the pipelines are congested they are going to care primarily about how well you can do the job.