When I bought my first batch of DVC points back in 2004, they were selling Saratoga, and my guide was really pushing me to buy there, touting that I will be able to get rooms at wherever I wanted at the 7 month window. Even back then, I didn't really believe that to be true (just basic supply and demand--more people would want to move from the bigger SSR to the smaller BCV or BWV resorts). Knowing I wouldn't be happy at SSR, I told her that I wasn't interested, but would definitely by BCV or BWV if they had points, and she found me the points I wanted.
Though there was a time when you can find reservations at most resorts earlier, those days are gone. Timeshares are really designed to be booked far in advance, and they are designed to be running at a high occupancy rate. I have always told people who ask me about DVC that they should buy points at a resort they want to spend most of their vacations at, and if they can't book at least 7 months in advance, they shouldn't bother.
All that being said, if you stalk the website, and play around, you can sometimes piece together a stay in less than 6 months out (I pieced together a 3 night stay at BLT for Food and Wine race weekend about four months last year, and also pieced together a 5 night stay at Copper Creek this year about 2 or 3 months out).
Also, it looks like the bungalows and cabins are filling up (maybe with people splurging or perhaps people with no other choice). If you look at the 60 day availability, there is nothing available in the cabins or bungalows for the next 60 days.