Meh, there are 15 or so young Chabad couples that live around me in CLE and I'd be utterly shocked to find this happening among them.
'Shock' would not come close to describing how I felt the first person I saw reading my BBM msg on Shabbos. I didn't believe it until the 3rd shabbos it happened.
Also, I would assume its more prevalent amongst less than typical, whole, functioning families.