P.S. Be sure to submit you request for Canadian Licence verification with the FAA in Oklahoma City stating which FAA Flight Standards District Office (FSDO) you will be traveling to to obtain your FAA certificate.
You won't be able to secure an FAA certificate unless you submit with your FAA application, the authorization letter that will be mailed to you from Oklahoma CIty. A copy of the same FAA authorization letter will be sent to that resepctive FSDO that you listed in your request, so you will be required to visit the same FSDO to secure your FAA certificate.
How long it's taking for the FAA to verify your Canadian Licence is unknown at this time.
You can take the 40 question exam at any time, via FAA-authorized computer testing sites. The FSDO's are not set up to administer written exams anymore, unlike Transport Canada.