Here is what I requested for our recent stay in a 1 bedroom Island View (just got back yesterday) trip:
"EWA Building
Higher floor room ending in xx77 or xx83"
When checking in I was sure to very nicely re confirm our request at the front desk, that I understood it was not guaranteed, and that we were happy to wait for our room.
We got room 677 and had a great view (will be posting it to the room views thread soon) and it was actually ready for us much earlier (around 10:30 am) than we had expected.
As wrld has stated before, the term EWA Long Hall is not a term used by the resort.... just a term used here on the DIS, so CM's may not be familiar with it.