The only time it matters is for CRT and the 3 dinner shows. This is because all that "linking" your resort reservation to a specific ADR does is check for an appropriate dining plan and flip the bit between full prepay and full cc-guarantee on those 4 locations. It doesn't matter one bit for any of the other multitudes of dining locations within the world.
In fact, I think they have removed the overall linking of resort reservation to dining beyond the above prepaid locations as well as determining 180+10 eligibility.