It took us a couple months for the whole process to start and finish.
We made our offer right before the resale restrictions were announced, and it went to ROFR just a few days after the announcement.
We received word back from ROFR that we had passed 30 days EXACTLY after it went to ROFR.
It took a couple weeks to get all of the documentation in line at the beginning, and a couple weeks on the end. So all in all, it was about 8 weeks or so.
We thought, and it felt like, it took forever! HAHA
We really were afraid that we weren't going to pass ROFR since our offer, and the seller's counter-offer landed us below $42 per point. BUT we did!
You just have to be patient - it feels like it takes forever! You just have to forget you're in the middle of an awesome transaction. Plan your next Disney vacation, take time to learn more about DVC, go shopping, go hiking... do anything to forget your are waiting! HAHA
Good luck!