1) Mobile survey responses have grown significantly between 2010-2012 in the US, from 6% to over 50% according to projections.
2) Tablet usage is highest among older age groups (70+), while smartphone usage increases with younger generations.
3) Different survey panels have varying rates of mobile penetration, ranging from 3.3% to 24.3% currently in the US.
The document discusses trends in mobile survey response rates in the US and how rates vary across different age groups and survey panels.