From a journalism.co.uk article about Metro:

“It’s very early days,” Walters said, and one of the key challenges is making swipe discoverable “as it’s not something people are used to using on a website”. But when people do swipe, and about 10 per cent of the base is using it, their consumption is “through the roof”. “They tend to consume between 10 and 20 pages per visit – which is staggering for a website. As we make that swipe functionality more visible and more obvious to users, we will start to drive up our overall consumption across the product dramatically.”

Read the full article at journalism.co.uk