Parents talking to their kids makes them smarter?

According to this article from the Independent (UK Newspaper), poor children do worse at school because their parents don't talk to them enough. I guess homeschooling should produce geniuses! I talk to my kids all day.

Quote:
The research also highlights the importance of teachers adopting a
conversational style with their pupils to get the best responses out of
them, rather than relying on direct teaching in front of the whole
class.

Cross-posted at Rational Homeschooling