"The Energy Content of Restaurant Foods Without Stated Calorie Information"  
JAMA IM May 13
http://archinte.jamanetwork.com/article.aspx?articleid=1687518
"Conclusions and Relevance  National chain restaurants have been criticized for offering meals with excess dietary energy. This study finds that independent and small-chain restaurants, which provide no nutrition information, also provide excessive dietary energy in amounts apparently greater than popular meals from chain restaurants or information in national food databases. A national requirement for accurate calorie labeling in all restaurants may discourage menus offering unhealthy portions and would allow consumers to make informed choices about ordering meals that promote weight gain and obesity."