Does "Erase All Content And Settings" do a secure erase? If yes, what type? Random characters or zeros? And does it do it once or 3x, 7x? It takes about 2 hours to erase a 16Gb iPhone 3G so I am thinking it probably is a secure erase and perhaps it's doing 3x. I would think zero'ing out or random'ing out the data would take much less than 2 hours for one go-around since to zero out 200 Gb on a hard drive on a Mac only takes 40 minutes.