no, not necessarily..
basically, life after secondary school (pre-U) can be summed up in
2 phases; the 1st 3 months and life after that 
for the 1st 3 months, the intake is based on your (my) prelims
results
When the O lvl results are released, students (and JCs) make
another choice, depending on the results..
so i may still go poly after the 1st 3 months..
or i may not 