are there really millions of Galaxy Tab users? Anyway, I don't think it's that 'devious' of a lie considering the iPad 2 will simply replace the iPad line, which sells 1 million per month, and will probably do more with the new device. It's not technically true just yet, but it almost certainly will be in a month's time. It would be different if the iPad 2 was a whole new product line.
By your standard, he shouldn't make a future claim even if the certainty is 100% because it hasn't happened yet. Most of us don't even hold ourselves to that standard, and I wonder if you do.
He didn't make a future claim. He presented the information as if it was already fact. The slide in question said that the iPad2 was "The first dual core tablet to ship in volume". It didn't say the iPad2 "Will be the first dual core to ship in volume."