gtalk is still the default IM in pretty much everyone I know from different social circles. Even fb messenger during work hours I tend to see pretty much everyone in gtalk while fb is very sparse. And don't get me started on whatsapp, I don't know a single person who uses that, and nobody seems to even be aware what it is when I ask around. I guess they all have different use cases. I for one have been and will stay with gtalk.