The issue isn't the amount of time a post is on the new page for, it's how many people get to see it before it falls off the page. So long as the number of peo

The issue isn't the amount of time a post is on the new page for, it's how many people get to see it before it falls off the page. So long as the number of people viewing the new page at any one time increases proportionally to the number of new submissions, a reduced time on the page won't be a problem. It's exposure to potential upvotes that's important, not total exposure time. That said, increased competition for the limited range of spots on the front page may eventually be a 'problem', but only if you think having too much excellent material as a problem and not an opportunity ;)