gc_aug_05
EAD, AP, FP notices will be mailed to you directly. Only if there is an RFE, it will go to the lawyer. Once I-485 is approved, it will be mailed to you directly with a courtsey copy to the lawyer as well.
Anyway, what is so unbelievable for you about the EAD approval ? Some are approved fast and some take time. That's all. You should be surprised if your I-485 was approved so fast. Goodluck.