Gene Munster, an analyst from Piper Jaffray, has estimated that around 600,000 to 700,000 iPads were bought on the first day itself. The numbers include pre-ordered iPads as well as walk-in purchases. It had taken three days for Apple to sell one million iPhone 3GS and 74 days to sell a million original iPhones.

Munster also claims that Apple still has enough iPads to continue its sales. This could be because of Apple's decision last week to move up the shipments of pre-ordered iPads. It is believed 75% of Saturday sales came from pre-orders. In its company website, Apple has mentioned that online orders will not be delivered until April 12.

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