in online apllication yea u will recieve a mail frst to check your my cic accnt for one message of medical clearance .Rest i also dont know xactly . I too applied on 21 july.. still no updates.. but i have heard dat we will recieve update till 10 august.. hope for best..
You get email on the same day or other day. only few ppl get in it day before the passport dispatch. So, if your status has changed today, you might find that mail by tomorrow. If not, then there is a serious problem.