Update: After playing a bit with the site described below it is not so far off to be unreasonable but still generally these things don't work from Roosevelt Island.
It's unfair to be from Roosevelt Island and to hope that new transportation calculation websites like "TripTrop NYC" will actually apply and work for us. Unfair to us and to the web site being reviewed.
According to the site's creator (via Gothamist) "you put in an address in New York and it overlays a map of how long it takes to get anywhere else in the city via subway and walking,"
If only it was true with regards to our little island. The time zones shown for Zip Code 10044 seem wonderful but in reality it just can't be. I seem to recall the same issues when reviewing a walking distance website some time back.