I'm more of a fan of continuous running myself, but I'm definitely curious about whether or not it can make me faster. I sent an email to Chris Twiggs (who runs the training programs for Jeff Galloway) and he informed me that his anecdotal evidence shows that most people average seven minutes faster times when they switch to run-walk. He did add the caveat that the improvements break down when the pace is faster than nine min/mile, but that one can expect a five minute improvement for the half marathon. I think that I'll stick with continuous running for Dopey 2025, but I might do a HM in Miami to see if run-walk might get me a faster time.
My strategy is self-admittedly unconventional for the marathon. I am planning on running the first nine miles at MP (8:30) until I get to Magic Kingdom. After leaving MK at Mile 9.5, I am going to see what time it is and run at my easy pace (most likely 10:30) to get to AK at 7:30 to ride Everest. Then, I switch back to MP from AK to DHS. Meet up with my daughter to ride Tower of Terror (and some other rides if I can). After that, I'll finish up the race at whatever pace feels comfortable.