It took Marriott about a month after they got my deed to change ownership. They blamed the holidays.
I just happened to be talking with MGVC the day ownership was changed, or at least the day that MGVC said that they could see it.
As stated, make sure that you have a copy of your deed, with the inventory control number on it. They would't do anything without it.
While I was on the phone with a Marriott Owners Service Rep (OSR), she called II for me and we setup an II account - glad I/we did that. I also reserved my 2012 week while we were on the phone. Funny that although MGVC setup everything that day, they said it would take 2 weeks before my owner account would become active - I could not log into MGVC. The owner account became active in about 10 day and I only knew about it because I saw it in II and I was finally able to login to MGVC as an owner.
By the way, the whole process of talking with an OSR, setting up my MGVC account, my II account, and reserving a week took over an hour on the phone.
So, I can finally see Marriott exchages in II for Hawaii, St. Thomas, Aruba, Paris, and Phuket: the reason I bought my Shadow Ridge.

I'm an owner!