Pending charge just showed up for the JW, still no email.
I called over there after we got our pending charge last night and they were not able to find me in the system. Called Q-Rooms and beautiful Rita was not only able to find me in the system but was able to find my JW confirmation number!
I know that confirmation number is good because I was able to use that number on my Marriott rewards card to look up the reservation and make sure everything was sorted.
Bottom line, you may not get an e-mail from the JW Marriott confirming your reservation, but if you were charged then you are probably fine.