"It is difficult to say whether Apple’s position with developers will remain strong if Android continues to gobble market share. But various surveys have tried

"It is difficult to say whether Apple’s position with developers will remain strong if Android continues to gobble market share. But various surveys have tried to gauge which smartphones developers plan to write apps for in the near future, and the iPhone often scores very high." I don't know what surveys the authors are referring to, as they don't list sources, but I doubt multiple surveys are needed to deduce mobile developers are interested in the iPhone.