processing times

[Molad 0]

hi everybody,i had submitted my case in October last year,i did my bio metrics in November ,got a mail for request for evidence in November and the office received and updated my status in December and up till now i have not received my EAD card so i got worried and called USCIS  today i spoke to a woman who said that they are still addressing cases in December 2016 and that meant i had to wait a long time so after the call i thought about calling them back to confirm this because i had given her my i485 receipt number,when i called back i spoke to another woman who helped me look into my 1765 case and said she was going to review it and have it sent to another office (i don't remember what she called it) so he put me on hold for some minutes and came back took my information and put me on hold again she confirmed that the case was received in December and that the processing times start all over from day 1 if you are asked to  provide evidence which i understand,so she provided me with a confirmation number and said i should get something in the mail in 15 days,my question is has anybody been through the same thing and does the response in 15 days mean that i will get my EAD card then because i am very positive about it and i don't want to be disappointed