Indeed, yes it is!
FYI
I cut and pasted my "receiving address" from my electrum wallet onto the Coinmama site and then confirmed that address before completing the transaction. I saved the request in my wallet and have waited about 30 minutes. My wallet balance is still showing zero and the saved request is still showing pending. The order on my Coinmama account is showing completed.
It can take up to (and technically over) 2 hours for even a high priority transaction to get confirmed.
What I usually do to check the address copied is right is to check the first and last three or four letters and also check a letter somewhere in the middle. (use the first three letters after the 1/3 in any address.