It really does. I've had a Dell 620 replaced recently. Nothing wrong with it as far as the diagnostics could tell but massive data corruption on the hard disk would take it out in under a day. Same hard disk, different unit and all (crossed fingers, crossed toes, touch wood) is fine so far.

Thank goodness it's a work laptop and not a personal laptop (one of our IT guys has had Dell flatly refusing to do anything because "nothing is wrong").