Assuming you are asking about for 18-24 year olds as in the parent comment: I, a 19 year old, interpret 'text' as at least mainly referring to SMS. So, that is

Assuming you are asking about for 18-24 year olds as in the parent comment: I, a 19 year old, interpret 'text' as at least mainly referring to SMS. So, that is one data point.