Something I've noticed from the updated interview invite statuses (17 on livewire and 16 on GMAT Club): all Asian invites are for the far-east countries, such as Malaysia, Lagos, Korea, Singapore . There's only 1 from India, none from China or any other Asian countries.
It's mostly American invites.
HBS hasn't explicitly stated, in 2017, that the invites are randomly sent out. This order makes sense to me because those based in Asia would not be opting for an on-campus interview anyway.
I'm an American-Pakistani (current address is Asian) so maybe I'm just seeing things that fit my narrative. Anyway, good luck to all!