What's the difference between an iPad "order" and an iPad "sale"? Maybe an iPad order is one submitted purchase, possibly for multiple iPads. iPad sales show the actual number of iPad units being sold. IF this is the case, however, where is he getting average of 1.125 iPads per order?
You also have to question the sampling technique but also what is being sampled. There are a certain percentage of people here who are not buying an iPad to use, but an iPad to resell. The perception that there is going to be a shortage is real. Apple itself is limiting folks to two.
Also likely getting a bit of worldwide developer buy before worldwide deployment. [ Offshore developers have strong motivation of getting earlier access, before local market appearance, to the iPad. ]
Neither one of the are long term sustainable contributors to sales. After the initial rush Apple's production capacity will catch up (for the most part) and the developers are a limited population.
Certainly there are going to be families or multiperson households/orgs that need more than one iPad. However, that is very likely to be atypical given the pricing. Most sales are going to be of just one. That fact that it is currently significantly above one is likely indicative that are not measuring long term sales trends.
He is speculating the 1 million order figure on data consisting of only 120 orders and 137 iPad sales?
Don't even have to go into sample size but sampling accuracy regardless of numbers. Frankly unless iPads are being assigned iPad unique order numbers only really measuring order numbers of the overall store. The sample size that is really in question is getting any signficant numbers of non-ipad order numbers in order to factor that out.
The other issue here is whether measuring demand that is just time shifted. There is little reason to assume that the drop in iPad pre-orders has bottomed out. The number of order would appear likely to continue to shrink over time, not got to some steady state. Folks who are waiting to handle one before ordering aren't likely to get off that bandwagon the closer get to April 3. They are still going to wait.
The run up to the sustainable steady state sell rate will only occur after folks have handled the iPad and have put aside (or have confidence in future flow ) money to pay for it. The opening weekend is a completely different set of primary motivator drivers ( "must be first", "blind faith" , "don't want to use, just need test device", etc. )
P.S. There is going to be growth over the course of the year in part because Apple is going to roll the iPad out to more countries over time. I suspect Apple will "manage" that growth to max out the "magical" iPad numbers over the course of the first year.