Professional and amateur analysts alike are widely split on how many iPads Apple may have sold in the fiscal quarter which ended Christmas Day, Fortune notes. Predictions for Q1 2011 are said to be more conservative than those for Q4 2010, which were so overeager that they were off by as much as 2.3 million. By contrast, the gap between present top- and bottom-end estimates amongst a group of 27 analysts is 2.54 million.