Perhaps unsurprisingly human-authored summaries were considered best, whereas, TCONVS2S was ranked 2nd, followed by PT-GEN.
the performance difference in TCONVS2S and PTGEN is greatly amplified when they are evaluated against document with highlights (6.48 and 5.54 Precision and Recall points) compared to when evaluated against the original documents (3.98 and 1.83 Precision and Recall points).