I just got back from the Tableau software conference in San Diego. There were thousands of people at this conference. Everyone I saw using a tablet was using an iPad. Windows laptops everywhere of course as it was a business conference, but tablets? iPad, iPad, iPad. Of course this is antidotal as I didn't see every person at the conference. But I also noticed it at the airport and on the plane. There again everyone I saw using a tablet was using an iPad. It does make me wonder about the statistics that iPad marketshare is declining. Where are all these people using other tablets? Especially with the Fire and Nexus 7 not being available in many countries outside of the United States. My bigger question is, how is market share calculated when many companies, like Amazon, refuse to disclose sales figures? Are these just guesses then? Guesses based on what, exactly?