Not when you publish it directly to steem when you post your wordpress post. Cheetah only does a quick google search with samples of the content the moment it is added to the blockchain (it checks new STEEM blocks as soon as they are posted). When posts are added to wordpress and steemit at the same time, it does not appear on google and thus cheetah does not react.

Makes sense, as if the content is shared at both sites at close to the same time, it is not like the steemit poster would have had the time to find and plagarize someone else's content.