typically what happens is this (after you attended an interview). They can actually come to a decision pretty fast and these are the possible scenarios:

1. they really want you, so they will inform you within the next few days that you have been proceeded to the next stage, or if you're done with the final stage they would offer you ASAP. They are actually having difficulty filling the numbers due to lack of quality? quantity? of candidates.

2. they aren't very sure about you, so they will KIV for a while

3. if they know they definitely don't want you, they will send you a rejection email within one week.

So if you haven't heard from them, well at least you aren't rejected yet. good luck guys!