I see WDW a lot, especially on Cable channels like Discovery, History, HGTV and Food Network. (National Buys)
And yes, Disneyland is usually regional. And WDW buys are regional buys in the mid-West over Disneyland for Decades.
Seems like Disneyland focus on All of California (NorCal, Central Cal and SoCal), Nevada and Arizona, plus Tijuana Mexico. Surprisingly, Salt Lake City gets buys from both Anaheim and Florida.
Disney much prefers selling vacation packages with Hotels over just DLR park tickets.
The South Pacific, aka Australia and New Zealand get buys (TV spots) from Disneyland, WDW, Tokyo DLR, Hong Kong DL and now China. Seems like it is a good market for all the parks.