Yes it can take this long, sometimes longer.

We review all requests manually and get hundreds of requests each month.

Part of the text in the email sent to you:

We manually review each request to make sure that the website complies with our cloud platform use policy (https://www.odoo.com/acceptable-use) and domain name registration guidelines.

This process may take some time due to the success of our free offer. We thank you in advance for your patience.

Hello Bob, 

It usually doesn't take that much time. I think you should contact Odoo for updates regarding this.