My case has been one of the weird one, I have not got any letter in the mail since starting of additional doc process.
Got email in Jan that my file from 2007 has been received.
Got email in Jan again that they need option C printout.
Got email in March for reminder of Option C printout
Got email in April (pdf attachment) that sponsorship approved, file moved to CPC-O
Page1: http://www13.speedy.sh/rNE8u/download/cic-1.jpg
Page2: http://www13.speedy.sh/Bndcz/download/cic-2.jpg
it does not say "Your application was received on ..., 2012"
Is this how everyone receiving approval letters in the mail.
Also anyone else got approval letter in email instead of mail?