Personally, I believe news feeds are not a terribly strong way to get visitors to return to your site. I believe there are other, better forms of content which provide much more value to visitors. On the other hand, it probably does not hurt to include a news feed on your site, except that when visitors click on article headlines they tend to be drawn away rather than towards your content. Basically, my recommendation is that a news feed can be useful to certain sites. It depends upon the purpose of your site and the strategy you use to get visitors to find your site, stay for a while, and then come back.
News feeds can serve to improve the odds that they return over and over.