That is nowhere near correct.
Contemporary to Magic Kingdom - 10 minutes
Contemporary to Epcot - 34 minutes
Contemporary to Hollywood Studios - 19 minutes
Contemporary to Animal Kingdom - 25 minutes
Animal Kingdom Lodge to Magic Kingdom - 21 minutes
Animal Kingdom Lodge to Epcot - 20 minutes
Animal Kingdom Lodge to Hollywood Studios - 19 minutes
Animal Kingdom Lodge to Animal Kingdom - 18 minutes
That's the length of the bus ride -- At least a 5-10 minute walk to the bus stop, and a wait of 0-30 minutes for an actual bus.
There is no way you're getting from your room at AKL to the front gate of Magic Kingdom in 21 minutes.
As I said -- It's a 30 minute minimum to get from AKL to the gate at Magic Kingdom, potentially longer.
So even using those numbers:
Ok, over a 5-6 night trip:
4 round trips to MK. 2 round trips to Epcot. 1 round trips to DHS and 1 round trip to AKL:
Using your numbers, from Contemporary: 304 minutes
From AKL: 322 minutes.
Now, factor in wait time for buses, etc-- From Contemporary, walk to MK, No waiting for a bus at all. It's truly just 10 minutes.
But for all bus rides, factor in another 15-30 minutes for getting to the bus stop, waiting for the bus, etc.
Adding in this time -- So adding an additional 20 minutes for each bus ride:
Contemporary: 464 minutes
AKL: 642 minutes.
So using this trip as an example, AKL adds an additional 3 hours of transit time.
[And that's why any resort from which you can walk to a park tops the list of transportation -- 0 wait time]
So the Contemporary wins on Magic Kingdom, they tie on Studios, and Animal Kingdom Lodge wins on Epcot (by a ton) and Animal Kingdom.
But that's what separates the transportation quality. If I'm planning a heavy MK trip, monorail resorts win by a landslide. If I'm planning a heavy Epcot trip, Boardwalk and Beach Club win by a landslide.
Animal Kingdom Lodge is ALWAYS a lot of commuting, regardless. And I don't know too many people that plan Animal Kingdom heavy trips. (I'm sure there are some).
If that's your travel pattern, I guess it makes sense. But five half-days at Magic Kingdom on a seven day trip seems crazy high to me. I typically do 7 full park days.
4 half-days at MK
3 half-days at Epcot
3 half-days at Studios
3 half-days at Animal Kingdom
1 half-day off or Disney Springs
I also didn't include resort hopping dinners. But put that aside..
Magic Kingdom has about 3x as many attractions as any other park, so makes sense to spend the time.
3 trips to AK seems crazy to me... There are only like 3-4 attractions that have any appeal to me. Easy to knock them all out. FOP, Safari and Everest... then done.
If they had night time entertainment at AK, I could see spending more time.
But honestly, 1 half day at Animal Kingdom is kinda max. Last time I did a 5 night trip, I skipped it entirely.
I went to Magic Kingdom 4 out of 5 nights. Sometimes just for 30 minutes.. just popping in to watching fireworks and then going back to the hotel.
You can't really do a 30-minute "pop in" visit while staying at AKL.