Scrubs to ABC: The worst-kept secret in Hollywood
So... why all the secrecy, even though everyone seems to know what's what? It seems like there's a little cross-network courtesy going on. While ABC is waiting for its upfront presentation to officially announce that it's picked up the show, they're also waiting for the end of the show's run on NBC, which is either May 8 or 15, depending on your source (my guess is the 18th, considering only nine of the twelve produced episodes have aired). According to Hibberd, ABC is playing nice after ticking off NBC when the initial news about the show's move came out.
NBC, for its part, isn't going to make a big deal out of the show's exit; they're planning on promoting the season finale as just that. No fanfare, no calling it the "NBC finale" or anything like that; ads will say it's the "season finale" and nothing more. Nice of NBC to be honest for once; I'm tired of them saying "Stay tuned for more" of my favorite shows, only to just show the credits under a promo for some other show. And don't get me started on those ER promos...