I have changed it in wp-customer-reviews.php for my site.
Using Dreamwaver or Notepad locate following lines in wp-customer-review.php template:
return array(false, ‘<div>Thank you for your comments. All submissions are moderated and if approved, yours will appear soon.</div>’); }
Then change text between <div> and </div> to whatever you like, for example:
return array(false, ‘<div>Thank you for your comments!</div>’); }
Now message will be displayed as “Thank you for your comments!” instead of “Thank you for your comments. All submissions are moderated and if approved, yours will appear soon.”
