I bet if the numbers were 25-29 year olds who had all left home, it would be significantly higher. I bet very few people in that bracket are actually making the decision to activate a landline in their own places.
I am 29 for a few blessed more months, and I have been landline-free since, well, leaving home for college and my own place. Had I been one of those stay-at-home-until-your-30s types, though, I would fall on the landline side of the statistical breakdown.
It also enables me to use a long distance calling card for free, so I can make calls that would cost far in excess of $4 to call my family in the UK.
We do have many friends who are solely cellular homes. It's cheaper for them to pay for low minutes on a smartphone plan than it is to get a land line.
Even if they were free I wouldn't have one, since when I did have a landline pretty much every call was phone spam.
Clear, high quality voice communication. I rarely talk on my cell phone. It's essentially for text. I try to call people at their landlines.
Then I moved to Silicon Valley. I've been counting down the days for Verizon to pick up the iPhone, ever since.
There's nothing wrong with the iPhone. AT&T, though...
I'm single and only have a cell, but my friends with kids inform me that landline for a family is the way to go. I see the logic in their argument.
They should have told us what percentage of those in this age group, who live on their own, have only cell service. But we can make a decent guess.