I'm sure the stolen computers have some type of lockdown security... unless they were stolen when in use some how and logged-in. I can hardly imagine bank computers not having password-protected logins and other security measures in place.
It's not a good situation, but I recall a similar situation this past summer in western Canada, where some HD's went missing from a data company that contained sensitive info about bank customers. Turns out it was just some guy whou wanted the HDs.
My guess is the info on this guys laptop is probably secure, but is likely not backed up.
Either that or he has his porn collection on there.