Yes, that's the whole point.

From The Daily Mail:

We eat THREE times more at a barbecue than at a normal dinner… A survey found we consume as many as 1,800 calories at a barbecue, while a typical meal at home has 500 to 700 calories.

So they mean "three times as much", not "three times more", for a start.

Either way, isn't that a bit like saying "We drink more beer in the pub than in Bar Mitzvah class" or "We eat more cake at birthday and wedding parties than in police custody" or something?

And the story is a puff piece for AXA PPP Healthcare to give them an excuse to waffle on about healthy eating.