On the most recent version of the poll I looked at, it was 51% Lakers, 49% Celtics, with 24,882 votes cast.
As of my most recent look at the poll:
5,530 of those votes came from California, where 77% of people voted for the Lakers. Only approximately 2,000 people have voted from New England. That explains your disparity.
Of the 50 states, only 10 are predicting the Lakers: California, Michigan, North Carolina, Alabama, Arkansas, South Dakota, Idaho, Nevada, Alaska, and Hawaii.
The Celtics lead in 36 states, and 4 states are tied.