Sequitur misquoted the article. According to a survey done by IDG Connect of enterprise workers who had iPads, 12% of them reported that the iPad has completely replaced their laptop. Other numbers and statistics of interest captured in the article here:
So you are entirely justified in your scepticism about that 12% being of all enterprise workers since:
There are roughly 154.4 million employed in the US. of which
22 million are employed by the US government
58.7 million employed by large business/enterprise (outside of US Gov)
81.8 million are employed by small business
so if you (arguably) add together the US Gov and enterprise you get 80.7 million, of which 12% is 9.6 million.
As of September 2011 Apple reported 39.8 million iPads sold - so OBVIOUSLY there is NO WAY Apple could have supplied 9.6 million iPads to enterprise employees. Nope. [/sarc]