A Wichita State University usability study compares three presentation formats of online news -- "full," "summary" and "links" pages. A snippet of its findings:
Overall, there were no statistical differences in search time across the three presentation types. However, the Summary condition was perceived most positively in terms of ease of finding information, being visually pleasing, promoting comprehension, participants' satisfaction with the site, and looking professional.
Insightful results. The section labeled "Discussion" has the meaty stuff.