Question: what competitive results did they obtain?
Answer: In case of read speech datasets,  their best model got the highest nov93 score of 16.1 and the highest nov92 score of 13.3.
In case of Conversational Speech, their best model got the highest SWB of 8.3 and the highest CHM of 19.3. 
Alternative answer: On WSJ datasets author's best approach achieves 9.3 and 6.9 WER compared to best results of 7.5 and 4.1 on nov93 and nov92 subsets.
On Hub5'00 datasets author's best approach achieves WER of 7.8 and 16.2 compared to best result of 7.3 and 14.2 on Switchboard (SWB) and Callhome (CHM) subsets.