When asked by Walt Mossberg why Android tablets have "completely flopped" in the marketplace, Andy Rubin, Senior VP of Mobile at Google, told the audience at AsiaD that there are around "6 million Android tablets out there" running Google services. "It’s not 30 million," Rubin said, but it’s a "healthy" start.
Amateur and professional analysts alike estimate that around 3.4 million are running Honeycomb. Apple just announced sales of 11.1 million iPads in the last quarter alone.