it's never too late. just dont' watch any of the most recent shows and you'll be fine. it is one of the few shows in the history of tv that gets better each and every season. the acting, cast, writing, production, music, everything has gotten better.
Oh, I know- just not really that interested in trying to catch up. She watches them all before I come home anyway- and I have WAY too many other things to catch up on. I've already gotten story summaries as she's gone through, so it's no big deal.