Independent candidate Franciso Pangilinan leads the survey conducted by the Social Weather Station (SWS) from February 24-27, 2007.
The SWS survey, which used the names of the 80 candidates who filed their certificates of candidacy also resulted in nine (9) of the opposition bets landing in the top 12.
Here is the list of the top 25 [...]

The Result of the Pre- election survey conducted by the Social Weather Station (SWS) from February 24-27 has already been released.
Here is the result:

These tables are taken from the Social Weather Station Website
Visit the SWS website for more details on the survey.