LOL, don't worry about the SEO. Google is smarter then you think. It has nothing to do with your domain. It has to do with the key words that are being searched for. Remember, no one knows the name of your domain when they search for something. Otherwise they would just go to your website directly. Basically this is how the search engines work. You go to(I will use google for the example) Google, you type in what you are looking for. Lets say for example you are looking for a game. So you put in the name of the game. For example, "Clash of the Titans". It will then return all the sites that use the words Clash of the Titans. Now these words can be in your title, body or in your meta data. It will first list the sites that are directly related to the Keywords. It doesn't care if your site has been moved or not. As long as you submit the new domain SEO. It will then take the usual 24-48 hours to propagate like your new domain does. This works for any website that is transferred, not just WP sites.