Apple’s (AAPL) new fourth-generation iPad took the tech world by surprise when it was unveiled during a press conference last month. While rumors of a very minor update to the company’s full-size iPad had been swirling for months, no one expected Apple to bill the tweaked tablet as a completely new product. It looks like consumers might not be very impressed with the minor update either, as the new iPad is already back in stock on Apple’s website currently shows all six “iPad with Retina display” models as being in stock and available to ship immediately. Wi-Fi + Cellular models will not be available until later this month. Apple announced on Monday that combined iPad mini and fourth-generation iPad sales totaled 3 million units during the devices’ first three days of availability.