grettlin,
The best answer to your question is that it depends on what schools you have applied to. The schools I have applied to have told me (because I've asked) that they won't view an application until it is complete, and that includes the receipt of DAT scores.
Other schools will view applications and schedule interviews at times even if they don't have your complete application. The schools that granted Desi interviews are in this catergory.
As a general rule of thumb, however, 90% of the schools WILL NOT view your application (consider you for interviews) until they have received your entire application. This includes fees, supplemental applications, residency forms, scholarship applications, DAT scores, AADSAS materials, letters of recs., etc.
Of course, it is possible to speak with schools before applying so as to maximize your chances based on their application procedures.
To directly answer your question: Yes, most schools will hold your application until receiving your DAT scores. But further, you still should send in your AADSAS application as soon as possible in the cycle! The schools having your AADSAS application but not having your DAT scores is much better than the schools having nothing. And as usual, AADSAS is notoriously slow and behind, whereas the ADA is usually prompt (2-3 weeks) in sending your DAT scores to schools.