A widely held clinical opinion is that borderline functioning in patients with eating disorders implies a long and difficult treatment with an uncertain outcome. Johnson, Tobin, and Dennis (1990) found that borderline bulimics had a markedly worse prognosis over 1 year than bulimics without borderline features. The present study used interview-based assessment of level of personality organization and confirmed the finding in an unselected group of eating disorder patients at 1-year follow-up. However, after 2 and 3 years, no such indications were evident. Instead, the borderline patients unexpectedly caught up, eliminating the initial advantage held by the neurotics, and after 3 years, there were no differences in outcome between the groups. Implications of these results are discussed.