Sources tell WSJ iPad to outsell iPhone within 3 months of sales start

Apple Inc. is still negotiating lowered-priced content deals from media companies for its iPad ahead of the device's April 3 launch, The Wall Street Journal reported Thursday on its Web site, citing unidentified sources close to the matter. Apple has already sold hundreds of thousands of the devices on pre-order, according to the Journal. The sources also told the newspaper that the iPad may outsell the iPhone within the first three months after launch.

My emphasis.

link: Apple still negotiating iPad media deals: WSJ - MarketWatch

That does not seem to be quite a huge feat.  The iPhone sold 1 million within 74 days and approximately 1.4 million in the first quarter.

With "a few hundred thousand" pre-sold it seems rather likely to me that an additional million for three months is not a stretch.