I have never asked myself that question this way round, but today I read my mailboxes while being twelve days behind. The antivirus program finally catched 39 examples of W32.Sobig.F@mm  and a bunch of messages marked with \”undeliverable\” from some \”postmaster\” of people I eventually luckily never had the chance to meet. If even the virus is marked to be medium destructive there is still some point of being behind reading emails.
It took me about an hour to read through the mails and get rid of the warning messages. Having had the chance to read The Times  last week and being alerted to Sobig, those holidays might have had some economizing effect regarding the gained time; it was probably nerve-saving as well.