all the coin are depend on bitcoin and can run without it. after 1 august this will be clear no body can clear about this problem.and if any body is saying something about it that is their assumption. and that is not 100% accurate.
We will see on August what can really happen, there were news that the August 1 event will be delay but as of now bitcointalk news as read above it says that we still need to prepare,so let's hope for the fast recovery of coins if dumps really occur or hope for successful development if ever.