Hi
Why you are considering the path of delay in the application process? If convenient take the IELTS and send the scores to the immigration office (to update your existing file). I agree with you that your proficiency in english letters will play an important role, however you never know they might ask for IELTS score. That means this will delay your application process.
I saw many applicants, who graduated from Canadian universities but immigration office asked for IELTS score later on.
Just an opinion:)
Wish you all the best lucks.
Assuming that the OP applied under SAP where no documents are submitted, s/he would have had to had the IELTS test within 1 year of submitting the application in Aug/2007. So for the IELTS to be accepted it would have had to be done by August/08. So s/he requires a valid IELTS, which won't happend until s/he is asked by the processing office for additional documents.
PMM