The demand cannot be guessed from Perms and not even approved I-140s. Simply
because, there is no way to tell all those from Perms and I-140s will
eventually apply for I-485.
The only way to know the demand is to count the no of I-485 applications
filed so far. Period.
And from Feb bulletin all 2009 people will file start filing 485s and as
everybody know 2009 has very low turn out and moreover the data won't be
available until April.
I believe the demand data for March bulletin and April bulletin will still
be low. The actual demand will be seen from May bulletin.
So very good forward movement until May bulletin. June/July will be slow.