A very good friend of mine is high up the management tree at Ocom (parent company of Leaseweb) and told me they wiped the servers 2 weeks after he got arrested because there were no requests from the dutch government to seize the servers. It's standard policy for Leaseweb to wipe servers 2 weeks after the account is closed and my guess is that Mr. Dotcom knew this very well.
I don't believe you, I just spend the last 30 minutes looking through all the legal, privacy, terms etc of lease web and NO where does it warn you that data will be kept for 2 weeks after the closure of an account before its deleted.
But apparently monthly backups are kept for 2 years.
I bet Leaseweb wants to cover their ass incase they got in trouble for what ever was on the drives.