I wouldn't worry too much - however you should send them an e-mail to inquire - maybe they sent you something and God forbid it got lost in the mail - so do inquire but as far as comparing your case with others - as much as we all do it there is no point in it because different visa officers are handling the cases and each has a different working style from the other.. Any how this is how the address can be changed:
address changes are not accepted by email, see below:
Please send us a signed fax or a signed letter (see fax number and address below) with the following information:
your original request to change your mailing address,
the full name of applicant and original signature,
the applicant's date of birth,
the file number [letter followed by a nine-digit number],
telephone number, including area code,
fax number, including area code,
the mailing address, and
a return fax number and/or e-mail address (if available)
Please do not send any new address information by email. As we require your signature on this information, kindly note that your current mailing address stands unchanged and this email has been deleted.