It isnt really huge, not as big as Main Street BakeryThat space inside is HUGE, I'm surprised they couldn't find any way to put seating in there. It almost makes me wonder if WDW is deliberately avoiding seating for their Starbucks venues.
Odd, since both Disneyland and DCA's Starbucks have seating.
By the time you have 2 serving sides and some queue space, it is gone.