Who,
I never heard of this kind of thing... Let me explain you what i know..
You apply thru mail filling I-765 form and you will receive a receipt notice from INS. If 90 days have passed and still you did not receive your approval, then walk in to nearest INS office with receipt and they will issue you Interim EAD(I think valid for 3 months... someone correct me if i am wrong).
PS