-Are there any backups left?: Is the database intact?
This is the key question.
The following is pure speculation.
I'm speculating that there were and are no offsite backups of the database. This would make the claim process nearly impossible (or maybe there is one but it is old, and the older it is the more difficult the claims process). (the hacker is probably submitting claims for each account from various IP addresses, just for lulz). If there were a backup of the database, users could claim their funds simply and quickly using their passwords, which were securely encrypted in the database. (there is of course the possibility of complications making this more difficult, eg if the hacker captured some passwords in plaintext before deleting the database).
If there is no recent offsite database backup is zhou's fault and he knows it, but he is doing damnedest to throw mud at Bitcoin Consultancy and save his ego. If he made no offsite backup could be blamed on his plain-as-day arrogance (why boast that he made the site in four days?) combined with lack of experience (after all, the Linode theft wasn't his fault but at the same could have been prevented had he done sufficient contingency planning).
There's other weird stuff going on which may or may not involve Bitcoin Consultancy. The WBX website has been revised and references to the founder and external parties other than Intersango and Bitcoin Consultancy have been removed. The founder is now claiming that
i have been advised the current database has been erased this happened last week
There is no mention of how the database came to be erased or who was in control of it when it was erased. Andre admits to having no control over the exchange site any more but he offers no information about who does have that control or when he relinquished it. If Bitcoin Consultancy is not actively involved with WBX, it would be in their best interests to publicly say so at this point.