Someone else asked a similar question just a week or two back. It may help to understand that GWT isn't about G or W, it's about GWT as a separate entity. The pages have been indexed; they just haven't been cross-checked against the sitemap.
You may also find interesting results if you check the new domain's Keywords periodically. Mine suddenly went haywire after a few months. It wasn't because I added a page or something got indexed that wasn't indexed before. It was because the GWT computer finally got around to updating the list itself, including results from two unusually fat pages.