sorta. (and keep in mind that also means that you will be penalized if you have to cancel that last minute booking.)
some waitlists may still get to the reservation before you do. also,
DVC makes "breakage" inventory available for cash booking at 60 days out...so you might also be competing with cash customers.
but there might also be some availability inside 30 days that wasn't there before...that is true. (but i still would never recommend DVC to someone who focused on last minute availability.)